1. Measuring Angles

CONCEPT PREVIEW In each figure, find the measures of the numbered angles, given that lines m and n are parallel.

CONCEPT PREVIEW In each figure, find the measures of the numbered angles, given that lines m and n are parallel.

CONCEPT PREVIEW Name the corresponding angles and the corresponding sides of each pair of similar triangles.

CONCEPT PREVIEW Name the corresponding angles and the corresponding sides of each pair of similar triangles.

CONCEPT PREVIEW Name the corresponding angles and the corresponding sides of each pair of similar triangles. (HK is parallel to EF.)

Find the measure of each marked angle.

Find the measure of each marked angle. In Exercises 19–22, m and n are parallel. See Examples 1 and 2 .

Find the measure of each marked angle.

Find the measure of each marked angle. In Exercises 19–22, m and n are parallel. See Examples 1 and 2 .

Find the measure of each marked angle.

Find the measure of each marked angle.

Find the measure of each marked angle. In Exercises 19–22, m and n are parallel. See Examples 1 and 2 .

Solve each problem. Length of a Road A camera is located on a satellite with its lens positioned at C in the figure. Length PC represents the distance from the lens to the film PQ, and BA represents a straight road on the ground. Use the measurements given in the figure to find the length of the road. (Data from Kastner, B., Space Mathematics, NASA.)