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Home > PC3 > Chapter 1 > Lesson 1.2.3 > Problem 1-102


Circle with a horizontal diameter, Right end point labeled, A, in top right quarter of the circle, point, labeled B, with radius from center to, B, labeled 1 m, and central angle for Arc, A,B, labeled 60 degrees.The circle at right has a radius of one meter. 

  1. How many degrees are in a half circle?

    It is half of .

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

    The circumference of the circle is . What is half of the circumference?

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

    What part of the circumference will have?

    What is  of the circumference?