Question

ΔABC is an equilateral triangle. m∠A = (3x - 12)°. Solve for x. A) 14 B) 19 C) 20 D) 24

Answer 1

option (d)

Explanation:

An equilateral triangle is a triangle whose all the sides are equal and all the angles are same.

There are three angles in a triangle and the according to the property of the angles of a triangle, the angle sum of a triangle is 180°.

So, in an equilateral triangle, the measure of each angle is 60°.

`3x-12= 60`

3x = 60 + 12

3x = 72

x = 24

option (d)