### Home > PC > Chapter 1 > Lesson 1.3.2 > Problem1-116

1-116.
1. The circle to the right has a radius of one meter. Homework Help ✎

1. How many degrees are in a half circle?

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

3. Using exact values, what is the length of ? You will have as part of your answer.

It is half of 360° or 180°.

Since the circumference of the circle is 2π(radius), the answer is 2π(1). So what is the arc length of half of the circle?

What part of the circumference will 60° have?

$\frac{1}{6}\text{ of\ the\ circumference\ or\ }\frac{2\pi}{6}$