2 lines that are intersected by a third line known as a transversal.

2 parallel horizontal lines with arrows on both ends to show that they extend indefinitely.

2 parallel horizontal lines with arrows on both ends to show that they extend indefinitely. The top…

2 parallel lines with arrows on both ends to show that they extend indefinitely. The lines are slanting…

2 parallel lines with arrows on both ends to show that they extend indefinitely. The lines are slanting…

2 parallel vertical lines with arrows on both ends to show that they extend indefinitely.

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

Illustration used to prove the theorem "If three or more parallel lines intercept equal segments on…

3 parallel horizontal lines with arrows on both ends to show that they extend indefinitely.

3 parallel lines with arrows on both ends to show that they extend indefinitely. The lines are slanting…

3 parallel lines with arrows on both ends to show that they extend indefinitely. The lines are slanting…

3 parallel vertical lines with arrows on both ends to show that they extend indefinitely.

4 parallel horizontal lines with arrows on both ends to show that they extend indefinitely.

4 parallel lines with arrows on both ends to show that they extend indefinitely. The lines are slanting…

4 parallel lines with arrows on both ends to show that they extend indefinitely. The lines are slanting…

4 parallel vertical lines with arrows on both ends to show that they extend indefinitely.

5 parallel horizontal lines with arrows on both ends to show that they extend indefinitely.

5 parallel lines with arrows on both ends to show that they extend indefinitely. The lines are slanting…

5 parallel lines with arrows on both ends to show that they extend indefinitely. The lines are slanting…

5 parallel vertical lines with arrows on both ends to show that they extend indefinitely.

6 parallel horizontal lines with arrows on both ends to show that they extend indefinitely.

6 parallel lines with arrows on both ends to show that they extend indefinitely. The lines are slanting…

6 parallel lines with arrows on both ends to show that they extend indefinitely. The lines are slanting…

6 parallel vertical lines with arrows on both ends to show that they extend indefinitely.

Alphabet of lines are lines needed to cover the lines with labeling symbols within the diagram.

Illustration that can be used to show the definition of an angle - an opening between two lines that…

Illustration used to show "The two perpendiculars to the sides of an angle from any point in its bisector…

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

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

An illustration of two angles that are adjacent. They have the same vertex and a common side between…

An illustration showing when one straight line meets another straight line and makes the adjacent angles…

Vertical angles are when two angles have the same vertex, and the sides of the one are prolongations…

"When the minor axis is at least two-thirds the major, the following method ma be used: Make CF and…

A belt conveyor is made up of two or more pulleys, with a continuos belt running through it. One or…

"Argent, a bend gules, invected between two hurts. INVECTED. A line formed with small semicircles, with…

"Gules, a bend sinister embattled, argent. EMBATTLED. A line, formed like the battlements on a wall…

Illustration showing that the bisector of a given angle is the locus of points equidistant from the…

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

"When such a surface is irregular in shape, suspend it at any point, so that it may move freely, and…

"When a line of direction falls within the base, a body stands when not, it falls... On the same principle,…