 ### 2 Lines Cut By A Transversal

Illustration of two straight lines, m and n, cut by a transversal t. ### 2 Lines Cut By A Transversal

Illustration of two straight lines, AB and CD, cut by a transversal EF. ### Line Bisecting Trapezoid Sides

Illustration used to prove the theorem "The line bisecting one of the non parallel sides of a trapezoid… ### Triangle With Segments

Triangle with segments drawn. ### Altitudes In A Triangle

Illustration used to show "The altitudes of a triangle are concurrent." ### Angle Bisectors In A Triangle

Illustration used to prove "The bisectors of the angles of a triangle are concurrent in a point which… ### Triangle With Bisectors of Base Angles

Illustration to show if the bisector of the base angles of a triangle are drawn, and through their point… ### Triangle With Lines From the Vertices That Join a Point Within

Illustration to show lines drawn from the vertices to join at a point within the triangle. ### Medians In A Triangle

Illustration used to show "Any two medians of a triangle intersect each other in a trisection point… ### Perpendicular Bisectors In A Triangle

Illustration used to prove "The perpendicular bisectors of the sides of a triangle are concurrent in… ### Triangular City Block With Angles and Lengths

Illustration showing an angle of 23 degrees 40 minutes making a triangle in a city block and marking… ### Vector

OP is a line representing a vector (directed quantity) ### Vector Showing Force at Angle of 20 degrees

OP is a vector (directed quantity) showing the force by a weight acting on it at an angle of 20 degrees. ### Line, Vertical

A vertical line with arrows at both ends to show that it extends indefinitely. ### Line, Vertical

A vertical line with arrows at both ends to show that it extends indefinitely. ### Drawing a Vertical Line

Vertical lines are drawn by using a triangle held against the T-square. ### Sketching Vertical Line

Vertical line is drawn downward with the pencil held with freedom, not close to the point.