### Home > PC > Chapter 1 > Lesson 1.3.2 > Problem 1-116

1-116.

The circle to the right has a radius of one meter.

How many degrees are in a half circle?

It is half of

or . What is the length of the arc that covers half of the circle?

Since the circumference of the circle is

, the answer is . So what is the arc length of half of the circle? Using exact values, what is the length of

? You will have as part of your answer. What part of the circumference will 60° have?