Question

The measure of ∠A is (12x-5)°. If x=9, find the measure of ∠A. Then classify the angle.

Answer 1

103° and the angle is obtuse

Answer 2

Given:

`\angle A=(12x-5)^(\circ)\\ \\ x=9`

Solution:

Substitute 9 for x in the expression for angle A.

`\angle A=12(9) -5=108-5=103^(\circ)\\ \\`

An obtuse angle is an angle of greater than 90° and less than 180°, so..

`\angle A \; is \; equal \; to \; 103^(\circ) \; and \; it \; is \; an \; Obtuse \; Angle!`