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May 2006

1. In the figure, Segment 1 is parallel to Segment 2.


2. When angle a1 = 40°, a2 = 30°, find the measure of angle a3.


3. When the Drag Point is between the segments and to the left of points R and T, find the expression for the angle a3 in terms of a1 and a2.

1. When the Drag point is below Segment 2 and to the left of points R and T, find the expression for the angle a3 in terms of a1 and a2.

1. Investigate Parallel Lines
2. Investigate Angles
3. Angles of Parallel Lines (PDF)

1. Glencoe: On Line Quiz

Carpenters use parallel lines in creating walls for construction projects. Copy the drawing below. Label your drawing and describe 3 different ways to guarantee that the wall studs (vertical boards) are parallel.