Question

PRACTICE

1 Determine the measure of the unknown angle in each triangle.
B
b P
A
78°
37°
C
80°
R
_Q
66

Answer 1

B= 65°

R= 34°

Explanation:

The formula for the equation is a big factor for solving equations like this.

1. Add both the numbers in the triangle together

2. Subtract that number from the number 180

3. After that you have the correct equation for the missing angle of a triangle

Answer 2

triangles have to add up to 180.

triangle A: 180-78-37= 65°

triangle B: 180-80-66= 34°