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Illustration showing coterminal angles of 85° and -275°. Coterminal angles are angles drawn in standard position that have a common terminal side. In this illustration, only the positive angle is labeled with the proper degree measure.

85° and -275° Coterminal Angles

Illustration showing coterminal angles of 85° and -275°. Coterminal angles are angles drawn…

Illustration showing coterminal angles of 90° and -270°. Coterminal angles are angles drawn in standard position that have a common terminal side. In this illustration, both angles are labeled with the proper degree measure.

90° and -270° Coterminal Angles

Illustration showing coterminal angles of 90° and -270°. Coterminal angles are angles drawn…

Illustration showing coterminal angles of 90° and -270°. Coterminal angles are angles drawn in standard position that have a common terminal side. In this illustration, neither angle is labeled.

90° and -270° Coterminal Angles

Illustration showing coterminal angles of 90° and -270°. Coterminal angles are angles drawn…

Illustration showing coterminal angles of 90° and -270°. Coterminal angles are angles drawn in standard position that have a common terminal side. In this illustration, only the negative angle is labeled with the proper degree measure.

90° and -270° Coterminal Angles

Illustration showing coterminal angles of 90° and -270°. Coterminal angles are angles drawn…

Illustration showing coterminal angles of 90° and -270°. Coterminal angles are angles drawn in standard position that have a common terminal side. In this illustration, only the positive angle is labeled with the proper degree measure.

90° and -270° Coterminal Angles

Illustration showing coterminal angles of 90° and -270°. Coterminal angles are angles drawn…

Illustration showing coterminal angles of 95° and -265°. Coterminal angles are angles drawn in standard position that have a common terminal side. In this illustration, both angles are labeled with the proper degree measure.

95° and -265° Coterminal Angles

Illustration showing coterminal angles of 95° and -265°. Coterminal angles are angles drawn…

Illustration showing coterminal angles of 95° and -265°. Coterminal angles are angles drawn in standard position that have a common terminal side. In this illustration, neither angle is labeled.

95° and -265° Coterminal Angles

Illustration showing coterminal angles of 95° and -265°. Coterminal angles are angles drawn…

Illustration showing coterminal angles of 95° and -265°. Coterminal angles are angles drawn in standard position that have a common terminal side. In this illustration, only the negative angle is labeled with the proper degree measure.

95° and -265° Coterminal Angles

Illustration showing coterminal angles of 95° and -265°. Coterminal angles are angles drawn…

Illustration showing coterminal angles of 95° and -265°. Coterminal angles are angles drawn in standard position that have a common terminal side. In this illustration, only the positive angle is labeled with the proper degree measure.

95° and -265° Coterminal Angles

Illustration showing coterminal angles of 95° and -265°. Coterminal angles are angles drawn…

Illustration showing an angle of depression from a horizontal line to a line of sight.

Angle of Depression

Illustration showing an angle of depression from a horizontal line to a line of sight.

"A quadrant, or one fourth of a circle. The oblique lines indicate various angles with the base. The heavy line indicates the inclination of the earth's axis as compared with the plane of its orbit, which is represented by the base." -Wiswell, 1913

Inclination of Earth's Axis

"A quadrant, or one fourth of a circle. The oblique lines indicate various angles with the base. The…

Illustration showing an angle of elevation from a horizontal line to a line of sight.

Angle of Elevation

Illustration showing an angle of elevation from a horizontal line to a line of sight.

Illustration of a polar graph/grid that is marked and labeled in 30° increments and units marked to 10.

Polar Grid In Degrees With Radius 10

Illustration of a polar graph/grid that is marked and labeled in 30° increments and units marked…

Illustration of a polar graph/grid that is marked, but not labeled, in 30° increments and units marked to 10.

Polar Grid In Degrees With Radius 10

Illustration of a polar graph/grid that is marked, but not labeled, in 30° increments and units…

Illustration of a polar graph/grid that is a unit circle marked and labeled in 30° increments.

Polar Grid In Degrees With Radius 1

Illustration of a polar graph/grid that is a unit circle marked and labeled in 30° increments.

Illustration of a polar graph/grid that is a unit circle marked, but not labeled, in 30° increments.

Polar Grid In Degrees With Radius 1

Illustration of a polar graph/grid that is a unit circle marked, but not labeled, in 30° increments.

Illustration of a polar graph/grid that is marked and labeled in 30° increments and units marked to 2.

Polar Grid In Degrees With Radius 2

Illustration of a polar graph/grid that is marked and labeled in 30° increments and units marked…

Illustration of a polar graph/grid that is marked, but not labeled, in 30° increments and units marked to 2.

Polar Grid In Degrees With Radius 2

Illustration of a polar graph/grid that is marked, but not labeled, in 30° increments and units…

Illustration of a polar graph/grid that is marked and labeled in 30° increments and units marked to 3.

Polar Grid In Degrees With Radius 3

Illustration of a polar graph/grid that is marked and labeled in 30° increments and units marked…

Illustration of a polar graph/grid that is marked, but not labeled, in 30° increments and units marked to 3.

Polar Grid In Degrees With Radius 3

Illustration of a polar graph/grid that is marked, but not labeled, in 30° increments and units…

Illustration of a polar graph/grid that is marked and labeled in 30° increments and units marked to 4.

Polar Grid In Degrees With Radius 4

Illustration of a polar graph/grid that is marked and labeled in 30° increments and units marked…

Illustration of a polar graph/grid that is marked, but not labeled, in 30° increments and units marked to 4.

Polar Grid In Degrees With Radius 4

Illustration of a polar graph/grid that is marked, but not labeled, in 30° increments and units…

Illustration of a polar graph/grid that is marked and labeled in 30° increments and units marked to 5.

Polar Grid In Degrees With Radius 5

Illustration of a polar graph/grid that is marked and labeled in 30° increments and units marked…

Illustration of a polar graph/grid that is marked, but not labeled, in 30° increments and units marked to 5.

Polar Grid In Degrees With Radius 5

Illustration of a polar graph/grid that is marked, but not labeled, in 30° increments and units…

Illustration of a polar graph/grid that is marked and labeled in 30° increments and units marked to 6.

Polar Grid In Degrees With Radius 6

Illustration of a polar graph/grid that is marked and labeled in 30° increments and units marked…

Illustration of a polar graph/grid that is marked, but not labeled, in 30° increments and units marked to 6.

Polar Grid In Degrees With Radius 6

Illustration of a polar graph/grid that is marked, but not labeled, in 30° increments and units…

Illustration of a polar graph/grid that is marked and labeled in 30° increments and units marked to 7.

Polar Grid In Degrees With Radius 7

Illustration of a polar graph/grid that is marked and labeled in 30° increments and units marked…

Illustration of a polar graph/grid that is marked, but not labeled, in 30° increments and units marked to 7.

Polar Grid In Degrees With Radius 7

Illustration of a polar graph/grid that is marked, but not labeled, in 30° increments and units…

Illustration of a polar graph/grid that is marked and labeled in 30° increments and units marked to 8.

Polar Grid In Degrees With Radius 8

Illustration of a polar graph/grid that is marked and labeled in 30° increments and units marked…

Illustration of a polar graph/grid that is marked, but not labeled, in 30° increments and units marked to 8.

Polar Grid In Degrees With Radius 8

Illustration of a polar graph/grid that is marked, but not labeled, in 30° increments and units…

Illustration of a polar graph/grid that is marked and labeled in 30° increments and units marked to 9.

Polar Grid In Degrees With Radius 9

Illustration of a polar graph/grid that is marked and labeled in 30° increments and units marked…

Illustration of a polar graph/grid that is marked, but not labeled, in 30° increments and units marked to 9.

Polar Grid In Degrees With Radius 9

Illustration of a polar graph/grid that is marked, but not labeled, in 30° increments and units…

Illustration of a polar graph/grid that is marked and labeled in 15° increments and units marked to 10.

Polar Grid In Degrees With Radius 10

Illustration of a polar graph/grid that is marked and labeled in 15° increments and units marked…

Illustration of a polar graph/grid that is marked, but not labeled, in 15° increments and units marked to 10.

Polar Grid In Degrees With Radius 10

Illustration of a polar graph/grid that is marked, but not labeled, in 15° increments and units…

Illustration of a polar graph/grid that is marked and labeled in 15° increments and units marked to 1.

Polar Grid In Degrees With Radius 1

Illustration of a polar graph/grid that is marked and labeled in 15° increments and units marked…

Illustration of a polar graph/grid that is marked, but not labeled, in 15° increments and units marked to 1.

Polar Grid In Degrees With Radius 1

Illustration of a polar graph/grid that is marked, but not labeled, in 15° increments and units…

Illustration of a polar graph/grid that is marked and labeled in 15° increments and units marked to 2.

Polar Grid In Degrees With Radius 2

Illustration of a polar graph/grid that is marked and labeled in 15° increments and units marked…

Illustration of a polar graph/grid that is marked, but not labeled, in 15° increments and units marked to 2.

Polar Grid In Degrees With Radius 2

Illustration of a polar graph/grid that is marked, but not labeled, in 15° increments and units…

Illustration of a polar graph/grid that is marked and labeled in 15° increments and units marked to 3.

Polar Grid In Degrees With Radius 3

Illustration of a polar graph/grid that is marked and labeled in 15° increments and units marked…

Illustration of a polar graph/grid that is marked, but not labeled, in 15° increments and units marked to 3.

Polar Grid In Degrees With Radius 3

Illustration of a polar graph/grid that is marked, but not labeled, in 15° increments and units…

Illustration of a polar graph/grid that is marked and labeled in 15° increments and units marked to 4.

Polar Grid In Degrees With Radius 4

Illustration of a polar graph/grid that is marked and labeled in 15° increments and units marked…

Illustration of a polar graph/grid that is marked, but not labeled, in 15° increments and units marked to 4.

Polar Grid In Degrees With Radius 4

Illustration of a polar graph/grid that is marked, but not labeled, in 15° increments and units…

Illustration of a polar graph/grid that is marked and labeled in 15° increments and units marked to 5.

Polar Grid In Degrees With Radius 5

Illustration of a polar graph/grid that is marked and labeled in 15° increments and units marked…

Illustration of a polar graph/grid that is marked, but not labeled, in 15° increments and units marked to 5.

Polar Grid In Degrees With Radius 5

Illustration of a polar graph/grid that is marked, but not labeled, in 15° increments and units…

Illustration of a polar graph/grid that is marked and labeled in 15° increments and units marked to 6.

Polar Grid In Degrees With Radius 6

Illustration of a polar graph/grid that is marked and labeled in 15° increments and units marked…

Illustration of a polar graph/grid that is marked, but not labeled, in 15° increments and units marked to 6.

Polar Grid In Degrees With Radius 6

Illustration of a polar graph/grid that is marked, but not labeled, in 15° increments and units…

Illustration of a polar graph/grid that is marked and labeled in 15° increments and units marked to 7.

Polar Grid In Degrees With Radius 7

Illustration of a polar graph/grid that is marked and labeled in 15° increments and units marked…

Illustration of a polar graph/grid that is marked, but not labeled, in 15° increments and units marked to 7.

Polar Grid In Degrees With Radius 7

Illustration of a polar graph/grid that is marked, but not labeled, in 15° increments and units…

Illustration of a polar graph/grid that is marked and labeled in 15° increments and units marked to 8.

Polar Grid In Degrees With Radius 8

Illustration of a polar graph/grid that is marked and labeled in 15° increments and units marked…

Illustration of a polar graph/grid that is marked, but not labeled, in 15° increments and units marked to 8.

Polar Grid In Degrees With Radius 8

Illustration of a polar graph/grid that is marked, but not labeled, in 15° increments and units…

Illustration of a polar graph/grid that is marked and labeled in 15° increments and units marked to 9.

Polar Grid In Degrees With Radius 9

Illustration of a polar graph/grid that is marked and labeled in 15° increments and units marked…

Illustration of a polar graph/grid that is marked, but not labeled, in 15° increments and units marked to 9.

Polar Grid In Degrees With Radius 9

Illustration of a polar graph/grid that is marked, but not labeled, in 15° increments and units…

Illustration of a polar graph/grid that is marked and labeled in 10° increments and units marked to 10.

Polar Grid In Degrees With Radius 10

Illustration of a polar graph/grid that is marked and labeled in 10° increments and units marked…

Illustration of a polar graph/grid that is marked, but not labeled, in 10° increments and units marked to 10.

Polar Grid In Degrees With Radius 10

Illustration of a polar graph/grid that is marked, but not labeled, in 10° increments and units…

Illustration of a polar graph/grid that is marked and labeled in 10° increments and units marked to 1.

Polar Grid In Degrees With Radius 1

Illustration of a polar graph/grid that is marked and labeled in 10° increments and units marked…

Illustration of a polar graph/grid that is marked, but not labeled, in 10° increments and units marked to 1.

Polar Grid In Degrees With Radius 1

Illustration of a polar graph/grid that is marked, but not labeled, in 10° increments and units…

Illustration of a polar graph/grid that is marked and labeled in 10° increments and units marked to 2.

Polar Grid In Degrees With Radius 2

Illustration of a polar graph/grid that is marked and labeled in 10° increments and units marked…

Illustration of a polar graph/grid that is marked, but not labeled, in 10° increments and units marked to 2.

Polar Grid In Degrees With Radius 2

Illustration of a polar graph/grid that is marked, but not labeled, in 10° increments and units…

Illustration of a polar graph/grid that is marked and labeled in 10° increments and units marked to 3.

Polar Grid In Degrees With Radius 3

Illustration of a polar graph/grid that is marked and labeled in 10° increments and units marked…

Illustration of a polar graph/grid that is marked, but not labeled, in 10° increments and units marked to 3.

Polar Grid In Degrees With Radius 3

Illustration of a polar graph/grid that is marked, but not labeled, in 10° increments and units…