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Home > CCG > Chapter 7 > Lesson 7.1.4 > Problem 7-43

7-43.

Felipe set his hinged mirror so that its angle was and the core region was isosceles, as shown at right.  

  1. How many sides did his resulting polygon have? Show how you know.

    How many times does go into ?

    Since , his regular polygon will have sides.

  2. What is another name for this polygon?

    See the Math Notes box in Lesson 7.1.4 on regular polygons.

A hinged mirror at an angle of 36 degrees.