Question

What is the measure of angle R?

Enter your answer as a decimal in the box. Round only your final answer to the nearest hundredth.

Answer 1

22.62 degrees

Explanation:

Right triangle

you can pick cosine or sine to calculate angle r

sin r = opposite leg/ hypotenuse = 5/13

arcsin(5/13) = 22.62 degrees

cos r = 12/13

r = arccos(12/13) = 22.62 degrees