Question

The measure of an obtuse angle is represented by the expression 2x + 5. What is a possible value for x?

90 < obtuse < 180


answer choices

87.6
42.3
75.4
35.2

Answer 1

To answer this, you have to replace each of the choices to x in the equation. If the answer is between 90° and 180°, then that is an obtuse angle which is the correct answer.

A. 2(87.6)+5 = 180.2°
B. 2(42.3)+5 = 89.6°
C. 2(75.4)+5 = 155.8°
D. 2(35.2)+5 = 75.4°

Therefore, the answer is letter C.