The measure of an angle is 49.2°. What is the measure of its complementary angle?

40.8°

Explanation:

Given that,

The measure of an angle is 49.2°.

We need to find the measure of its complementary angle. We know that for a complementary angle, the sum of two angles is equal to 90 degrees. So,

a+b = 90

49.2+b = 90

b = 90-49.2

b = 40.8°

So, the measure of its complementary angle is 40.8°.

the answer would be the third option, "no, ariel should have added 9^2 and 12^2 and compared that to 15^2."

this is found through the pythagorean theorem, which is a^2 + b^2 = c^2.

this is the correct way of solving the problem:

9^2 + 12^2 = 15^2

81 + 144 = 225

225 = 225