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..

$\angle A \; is \; equal \; to \; 103^{\circ} \; and \; it \; is \; an \; Obtuse \; Angle!$