Answer:
6+6+3=15 its 15 square centimeters
The answer is <span>4.84166667</span>
I'm sorry ninth grade slow learner

Actually Welcome to the Concept of the Equilateral Triangles.
Since, we know that, all the sides of a triangle are equal, hence it is a Equilateral triangle.
Equilateral triangle has one all angles equal to 60°.
so, major angle P = 60°
hence, 2x=60°
===> x = 30°