Question

Find the missing side length, and enter your answer in the box below. If necessary, round your answer to 2 decimal places. ​

Answer 1

87°

Explanation:

We know that sum of angles of triangle is 180 ° .

• Let as assume that the length of missing side be x.

21° + 72° + x = 180°

combine like terms

93 ° + x = 180 °

Subtract 93 ° from each side

93° - 93° + x = 180° - 93°

x = 87 °

Answer 2

75

Explanation: