1. Measuring Angles

Give an expression that generates all angles coterminal with an angle of π/6 radian. Let n represent any integer.

Convert each degree measure to radians. Leave answers as multiples of π .

45°

Convert each degree measure to radians. Leave answers as multiples of π.

175°

Convert each degree measure to radians. Leave answers as multiples of π.

800°

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.