 ### Plane Angle of Incidence

A diagram illustrating the airplane's angle of incidence at axis A, direction of motion and thrust. ### Plane Pointing Down Angle of Incidence

The diagram illustrating the plane's angle of incidence pointing down at the motion axis. The plan will… ### Angle of Vision

"The angle under which the rays of light, coming from the extremities of an object, cross each other… ### Acute Angle

An illustration showing an angle the is less than a right angle. This is an acute angle. ### Bisected Angle

Illustration to show that if an angle is bisected, and if a line drawn through the vertex perpendicular… ### Bisected Angles

Illustration to show that the bisectors of two supplementary adjacent angles are perpendicular to each… ### Bisected Angle

Illustration to show that the bisector of one of two vertical angles bisects the other. ### Bisected Angles

Illustration to show that the bisector of two pairs of vertical angles formed by two intersecting lines… ### Bisected Vertical Angle of an Isosceles Triangle

Illustration to show that the bisector of the vertical angle of an isosceles triangle bisects the base,… ### Angle Bisector Drawn Parallel to A Side

Illustration to show that if through any point in the bisector of an angle a line is drawn parallel… ### Construction of Angle

Illustration of construction to lay off an angle. ### Construction Of A Divided Angle

An illustration showing the construction used to divide an angle into two equal parts. "With C as a… ### Construction Of A Divided Angle

An illustration showing the construction used to divide an angle into two equal parts when the lines… ### Perpendiculars To The Sides Of An Angle

Illustration used to show "The two perpendiculars to the sides of an angle from any point in its bisector… ### Perpendiculars To The Sides Of An Angle

Illustration used to show "The two perpendiculars to the sides of an angle from any point not in its… ### Straight Angle

An illustration showing a straight angle. When the sides of an angle extend in opposite directions,… ### Trihedral Angle

Trihedral angle. "The sum of any two face angles of a trihedral angle is greater than the third face… ### Acute and Reflex Angles

Illustration showing two positive angles; angle 1 being the acute angle and angle 2 being the reflex… ### Acute, Obtuse, Straight, Right, And Reflex Angles

An illustration showing acute, obtuse, straight, right, and reflex angles. An illustration of two angles that are adjacent. They have the same vertex and a common side between… Angles 1 and 2 are adjacent angles. Two angles with a common vertex and a common side between them are… ### Complementary Angles

Illustration of complementary angles. Two angles whose sum is a right angle. ### Equal Right Angles

Illustration used to prove that all right angles are equal. ### Evolute Spiral Angles

The evolute spiral angle is a wave pattern that mimics the wave of the sea. ### Evolute Spiral Angles

The evolute spiral angle is a wave pattern that mimics the wave of the sea. ### Obtuse And Reflex Angles

An illustration showing an angle the is greater than a right angle and less than a straight angle. This… ### Angles With Parallel Sides

Illustration of angles with parallel corresponding sides. ### Angles With Parallel Sides

Illustration of angles with parallel sides going in the opposite direction. ### Angles With Parallel Sides

Illustration of angles with parallel sides. "GH is parallel to and lies in the same direction as DE,… ### Relationships Between 4 Angles

Illustration showing four angles that can be used to define different relationships, such as adjacent,… ### Relationships Between 4 Angles

Illustration showing four angles that can be used to define different relationships, such as adjacent,… ### Relationships Between 6 Angles

Illustration showing six angles that can be used to define different relationships, such as adjacent,… ### Sum of 2 Acute Angles

Illustration of two triangles, showing the sine of the sum of two acute angles expressed in terms of… ### Superposition of Angles

Illustration of the superposition of two angles to compare magnitudes of the same kind. ### Supplementary Angles

Illustration of supplementary angles. Two angles whose sum is a straight angle. ### Supplementary Angles

Illustration of supplementary angles. Two angles whose sum is a straight angle. This can be used tow… ### Supplementary Angles

Illustration of supplementary angles. Two angles whose sum is a straight angle. This can be used tow… ### Supplementary Angles

Illustration that can be used to show supplementary angles. The angles form a straight line. ### Supplementary Angles

Illustration of supplementary angles. Angles LMK and KMH are supplementary. ### Supplementary and Right Angles

Illustration showing angles 1 and 2 are supplementary and angles ACD and DCB are supplementary. Also,… ### Vertical Angles

Vertical angles are when two angles have the same vertex, and the sides of the one are prolongations… ### Angles With Parallel Sides

Illustration of two angles whose sides are parallel, each to each, to show they are either equal or… ### Anglo-Saxon Ships with Wind in the Sails

A fleet of three ancient Anglo-Saxon ships, each with wind filling the lone sail. Each ship has a dragon… ### Positive and Negative Arcs in Circles

Illustration showing arcs measured in positive and negative angles. ### Bevel Square

Bevel, is a and tool consisting of two rules that are hinged together so you can draw or measure angles… ### Angle Bisector

Illustration showing that the bisector of a given angle is the locus of points equidistant from the… ### Perpendicular Bisector of a Line

Illustration showing that the perpendicular bisector of a given line is the locus of points equidistant… ### Ambiguous Case

Illustration of one possible outcome (no triangle occurs) when discussing the ambiguous case using the… ### Ambiguous Case

Illustration of one possible outcome (1 triangle occurs) when discussing the ambiguous case using the… ### Ambiguous Case

Illustration of one possible outcome (2 triangles occur) when discussing the ambiguous case using the… ### Circle With 36 degree Angles and Radius 1.5 in.

Circle with 36 degree angles marked. This diagram can be used with the following trig problem: Locate… ### Circle With Center o and Radius r with point P

Circle modeling the earth. O is the center of the earth, r the radius of the earth, and h the height… ### Circle With Chord and Tangent

Illustration of a circle showing an angle included by a tangent and a chord drawn from the point of… ### Circle With a Chord of 2 ft. and a Radius of 3 ft.

Circle with chord AB=2 ft. and radius OA = 3 ft.. Triangle AOC is a right triangle. Angle AOC=half angle… ### Circle with Segment, Semicircle, Sector, Quadrant, and Central Angle

Illustrations of a circle with segment, semicircle, sector, quadrant, and central angles drawn. ### Circle With Two Intersecting Chords

Illustration of a circle with two intersecting chords within the circumference. The angle formed is… ### Circle With Two Tangents Drawn From an External Point

Illustration of a circle which illustrates that the tangents to a circle drawn from an external point…