A right triangle with degrees 19, 71, 90.

Right Triangle degrees 19, 71, 90

A right triangle with degrees 19, 71, 90.

A right triangle with degrees 20, 70, 90.

Right Triangle degrees 20, 70, 90

A right triangle with degrees 20, 70, 90.

A right triangle with degrees 21, 69, 90.

Right Triangle degrees 21, 69, 90

A right triangle with degrees 21, 69, 90.

A right triangle with degrees 22, 68, 90.

Right Triangle degrees 22, 68, 90

A right triangle with degrees 22, 68, 90.

A right triangle with degrees 23, 67, 90.

Right Triangle degrees 23, 67, 90

A right triangle with degrees 23, 67, 90.

A right triangle with degrees 24, 66, 90.

Right Triangle degrees 24, 66, 90

A right triangle with degrees 24, 66, 90.

A right triangle with degrees 25, 65, 90.

Right Triangle degrees 25, 65, 90

A right triangle with degrees 25, 65, 90.

A right triangle with degrees 26, 64, 90.

Right Triangle degrees 26, 64, 90

A right triangle with degrees 26, 64, 90.

A right triangle with degrees 27, 63, 90.

Right Triangle degrees 27, 63, 90

A right triangle with degrees 27, 63, 90.

A right triangle with degrees 28, 62, 90.

Right Triangle degrees 28, 62, 90

A right triangle with degrees 28, 62, 90.

A right triangle with degrees 29, 61, 90.

Right Triangle degrees 29, 61, 90

A right triangle with degrees 29, 61, 90.

A right triangle with degrees 30, 60, 90.

Right Triangle degrees 30, 60, 90

A right triangle with degrees 30, 60, 90.

A right triangle with degrees 31, 59, 90.

Right Triangle degrees 31, 59, 90

A right triangle with degrees 31, 59, 90.

A right triangle with degrees 32, 58, 90.

Right Triangle degrees 32, 58, 90

A right triangle with degrees 32, 58, 90.

A right triangle with degrees 33, 57, 90.

Right Triangle degrees 33, 57, 90

A right triangle with degrees 33, 57, 90.

A right triangle with degrees 34, 56, 90.

Right Triangle degrees 34, 56, 90

A right triangle with degrees 34, 56, 90.

A right triangle with degrees 35, 55, 90.

Right Triangle degrees 35, 55, 90

A right triangle with degrees 35, 55, 90.

A right triangle with degrees 36, 54, 90.

Right Triangle degrees 36, 54, 90

A right triangle with degrees 36, 54, 90.

A right triangle with degrees 37, 53, 90.

Right Triangle degrees 37, 53, 90

A right triangle with degrees 37, 53, 90.

A right triangle with degrees 38, 52, 90.

Right Triangle degrees 38, 52, 90

A right triangle with degrees 38, 52, 90.

A right triangle with degrees 39, 51, 90.

Right Triangle degrees 39, 51, 90

A right triangle with degrees 39, 51, 90.

A right triangle with degrees 40, 50, 90.

Right Triangle degrees 40, 50, 90

A right triangle with degrees 40, 50, 90.

A right triangle with degrees 41, 49, 90.

Right Triangle degrees 41, 49, 90

A right triangle with degrees 41, 49, 90.

A right triangle with degrees 42, 48, 90.

Right Triangle degrees 42, 48, 90

A right triangle with degrees 42, 48, 90.

A right triangle with degrees 43, 47, 90.

Right Triangle degrees 43, 47, 90

A right triangle with degrees 43, 47, 90.

A right triangle with degrees 44, 46, 90.

Right Triangle degrees 44, 46, 90

A right triangle with degrees 44, 46, 90.

A right triangle with degrees 45, 45, 90.

Right Triangle degrees 45 45, 90

A right triangle with degrees 45, 45, 90.

Every elliptical involution has the property that there are two definite points in the plane from which any two conjugate points are seen under a right angle.

Circular Involution

Every elliptical involution has the property that there are two definite points in the plane from which…

To find the angle between two given lines a, b of which the projections a1, b1 and a2, b2 are given.

Angle of Two Lines

To find the angle between two given lines a, b of which the projections a1, b1 and a2, b2 are given.

To determine the angle between two planes.

Angle of Two Planes

To determine the angle between two planes.

The straight line is the simplest type of locus and the simplest first degree equation.

Straight Line

The straight line is the simplest type of locus and the simplest first degree equation.

Sir Robert S. Ball's Theory of Screws.

Theory of Screws

Sir Robert S. Ball's Theory of Screws.

The lines of contact are equal, but the axes are neither parallel to each other, or the line of contact.

Lateral Sliding Contact

The lines of contact are equal, but the axes are neither parallel to each other, or the line of contact.

An instrument for making a reduced, enlarged, or exact copy of a plane figure

Pantograph

An instrument for making a reduced, enlarged, or exact copy of a plane figure

Circles should be unshaded or shaded evenly with thick and thin lines, changing at about 45 degrees.

Drawing Lines 4

Circles should be unshaded or shaded evenly with thick and thin lines, changing at about 45 degrees.

Method to bisect an angle

Bisect An Angle

Method to bisect an angle

Draftsman's first method for creating an ellipse

Ellipse First Method

Draftsman's first method for creating an ellipse

Draftsman's fourth method for drawing an ellipse, case 3

Ellipse Fourth Method Case 3

Draftsman's fourth method for drawing an ellipse, case 3

Draftsman's first method for drawing a parabola

Parabola First Method

Draftsman's first method for drawing a parabola

An angle ornament in the hall of the Ministry of State in Paris.

Angle Ornament

An angle ornament in the hall of the Ministry of State in Paris.

An angle ornament in the Louvre, Paris.

Angle Ornament

An angle ornament in the Louvre, Paris.

Angle of degree 1

Angle Degrees 1

Angle of degree 1

Angle of degree 2

Angle Degrees 2

Angle of degree 2

Angle of degree 3

Angle Degrees 3

Angle of degree 3

Angle of degree 4

Angle Degrees 4

Angle of degree 4

Angle of degree 5

Angle Degrees 5

Angle of degree 5

Angle of degree 6

Angle Degrees 6

Angle of degree 6

Angle of degree 7

Angle Degrees 7

Angle of degree 7

Angle of degree 8

Angle Degrees 8

Angle of degree 8

Angle of degree 9

Angle Degrees 9

Angle of degree 9

Angle of degree 10

Angle Degrees 10

Angle of degree 10

Angle of degree 11

Angle Degrees 11

Angle of degree 11

Angle of degree 12

Angle Degrees 12

Angle of degree 12

Angle of degree 13

Angle Degrees 13

Angle of degree 13

Angle of degree 14

Angle Degrees 14

Angle of degree 14

Angle of degree 15

Angle Degrees 15

Angle of degree 15

Angle of degree 16

Angle Degrees 16

Angle of degree 16

Angle of degree 17

Angle Degrees 17

Angle of degree 17

Angle of degree 18

Angle Degrees 18

Angle of degree 18

Angle of degree 19

Angle Degrees 19

Angle of degree 19