Question

Find the measure of angle A. Round your answer to the nearest whole number​

Answer 1

∠ A ≈ 53°

Explanation:

Using the tangent ratio in the right triangle

tan A =
`(opposite)/(adjacent)` =
`(BC)/(AC)` =
`(12)/(9)` , then

∠ A =
`tan^(-1)` (
`(12)/(9)` ) ≈ 53° ( to the nearest whole number )