### Home > PC3 > Chapter 2 > Lesson 2.1.3 > Problem2-41

2-41.

Recall some facts from your Chapter 1 investigation of radian measure.

1. How many radians are in a full circle?

What is the ratio of the circumference of a circle to its radius?

2. How many radians are in half a circle?

1. What are the radian measures that correspond to the following degree measures?

1. $30º$

1. $45º$

1. $60º$

Review your work from problem 1-111.