### Home > GC > Chapter 2 > Lesson 2.2.1 > Problem 2-63

2-63.

**Examine** the triangle below.

If

and, then what is?Solve for

if,, and. Then find.Use the same method as part (a).

If

, what type of triangle is? It is an equilateral triangle.

Look at the Math Notes Box in Lesson 2.2.1 (on page

in the student text).