### Intersecting Lines, 2 Perpendicular

2 intersecting lines, one of which is vertical and one of which is horizontal. The intersection forms…

### Right Angle

Right angle with square at perpendicular lines

### Angles

Four types of angles: right, obtuse, acute, and straight.

### Angles

Showing different types of angles: right, acute, and obtuse.

### Circle With Inscribed Right Angle in Semicircle

Illustration of a circle with a right angle inscribed in a semicircle.

### Circular Involution

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

### Drawing Lines 4

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

### Projections of a Line

Projections of a line perpendicular to a plane.

### Perpendicular Lines

Right angle at perpendicular lines demonstrated by string on plumb line.

### Perpendicular Lines

Illustration of perpendicular lines. Intersecting lines that meet at a right angle.

### Perpendicular Lines With Horizontal and Vertical Labeled

Illustration of perpendicular lines with the horizontal and vertical lines labeled. "A horizontal line…

### Box Parallel

Cast metal box parallel with finished surfaces used to for set-ups in machining, layout, and inspection.

### Perpendicular Line Drawn From Point P to Line RS

A perpendicular line drawn from point P to straight line RS.

### Projection of a Line Segment

CD is the projection of AB upon OX. In each case AE=CD and AE=ABcos theta.

### Right Triangle degrees 1, 89, 90

A right triangle with degrees 1, 89, 90.

### Right Triangle degrees 10, 80, 90

A right triangle with degrees 10, 80, 90.

### Right Triangle degrees 11, 79, 90

A right triangle with degrees 11, 79, 90.

### Right Triangle degrees 12, 78, 90

A right triangle with degrees 12, 78, 90.

### Right Triangle degrees 13, 77, 90

A right triangle with degrees 13, 77, 90.

### Right Triangle degrees 14, 76, 90

A right triangle with degrees 14, 76, 90.

### Right Triangle degrees 15, 75, 90

A right triangle with degrees 15, 75, 90.

### Right Triangle degrees 16, 74, 90

A right triangle with degrees 16, 74, 90.

### Right Triangle degrees 17, 73, 90

A right triangle with degrees 17, 73, 90.

### Right Triangle degrees 18, 72, 90

A right triangle with degrees 18, 72, 90.

### Right Triangle degrees 19, 71, 90

A right triangle with degrees 19, 71, 90.

### Right Triangle degrees 2, 88, 90

A right triangle with degrees 2, 88, 90.

### Right Triangle degrees 20, 70, 90

A right triangle with degrees 20, 70, 90.

### Right Triangle degrees 21, 69, 90

A right triangle with degrees 21, 69, 90.

### Right Triangle degrees 22, 68, 90

A right triangle with degrees 22, 68, 90.

### Right Triangle degrees 23, 67, 90

A right triangle with degrees 23, 67, 90.

### Right Triangle degrees 24, 66, 90

A right triangle with degrees 24, 66, 90.

### Right Triangle degrees 25, 65, 90

A right triangle with degrees 25, 65, 90.

### Right Triangle degrees 26, 64, 90

A right triangle with degrees 26, 64, 90.

### Right Triangle degrees 27, 63, 90

A right triangle with degrees 27, 63, 90.

### Right Triangle degrees 28, 62, 90

A right triangle with degrees 28, 62, 90.

### Right Triangle degrees 29, 61, 90

A right triangle with degrees 29, 61, 90.

### Right Triangle degrees 30, 60, 90

A right triangle with degrees 30, 60, 90.

### Right Triangle degrees 31, 59, 90

A right triangle with degrees 31, 59, 90.

### Right Triangle degrees 32, 58, 90

A right triangle with degrees 32, 58, 90.

### Right Triangle degrees 33, 57, 90

A right triangle with degrees 33, 57, 90.

### Right Triangle degrees 34, 56, 90

A right triangle with degrees 34, 56, 90.

### Right Triangle degrees 35, 55, 90

A right triangle with degrees 35, 55, 90.

### Right Triangle degrees 36, 54, 90

A right triangle with degrees 36, 54, 90.

### Right Triangle degrees 37, 53, 90

A right triangle with degrees 37, 53, 90.

### Right Triangle degrees 38, 52, 90

A right triangle with degrees 38, 52, 90.

### Right Triangle degrees 39, 51, 90

A right triangle with degrees 39, 51, 90.

### Right Triangle degrees 40, 50, 90

A right triangle with degrees 40, 50, 90.

### Right Triangle degrees 41, 49, 90

A right triangle with degrees 41, 49, 90.

### Right Triangle degrees 42, 48, 90

A right triangle with degrees 42, 48, 90.

### Right Triangle degrees 43, 47, 90

A right triangle with degrees 43, 47, 90.

### Right Triangle degrees 44, 46, 90

A right triangle with degrees 44, 46, 90.

### Right Triangle degrees 45 45, 90

A right triangle with degrees 45, 45, 90.

### Right Triangle degrees, 46, 44, 90

A right triangle with degrees, 46, 44, 90

### Right Triangle degrees, 47, 43, 90

A right triangle with degrees, 47, 43, 90

### Right Triangle degrees, 48, 42, 90

A right triangle with degrees, 48, 42, 90

### Right Triangle degrees, 49, 41, 90

A right triangle with degrees, 49, 41, 90

### Right Triangle degrees 5, 85, 90

A right triangle with degrees 5, 85, 90.

### Right Triangle degrees, 50, 40, 90

A right triangle with degrees, 50, 40, 90

### Right Triangle degrees, 51, 39, 90

A right triangle with degrees, 51, 39, 90

### Right Triangle degrees, 53, 37, 90

A right triangle with degrees, 53, 37, 90