÷ÈÓ°Ö±²¥

In each exercise some information is given. Use this information to name the segments that must be parallel. If there are no such segments, say so.

$m∠1=m∠8$

Name the coordinates of each point.

$\mathit{M}$

Match the orthographic projects with their isometric drawings. If there is no isometric drawing, then make one.

For each polygon, find (a) the interior angle sum and (b) the exterior angle sum.

n-gon.

Draw a pentagon with one exterior angle at each vertex. Cut out the exterior angles and arrange them so that they all have a common vertex, as shown at the far right. What is the sum of the measures of the exterior angles? Repeat the experiment with a hexagon. Do your results support Theorem 3-14?

Imagine stretching a rubber band around each of the figures in exercises 1-6. What is the relationship between the rubber band and the figure when the figure is a convex polygon?

A polygon has 102 sides. What is the interior angle sum? The exterior angle sum?

Explain how each corollary of Theorem 3-11 follows from the theorem

Corollary 4

Name the two lines and the transversal that form each pair of angles.

and

Complete.

8. An octagon has$\underset{¯}{?}$ sides.