Δabc is an equilateral triangle. m∠a = (3x - 12)°. solve for x. a) 14 b) 19 c) 20 d) 24

option (d)

Step-by-step 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 = 60 + 12

3x = 72

x = 24

option (d)

yep

step-by-step explanation:

think about it deeply and passionately about this property

i am sorry