A triangle has sides measuring 15, 15, and 15 square root 2 .

What are the angle measures of the triangle?

A.
15°, 15°, and 21.2°

B.
30°, 60°, and 90°

C.
45°, 45°, and 90°

D.
60°, 60°, and 60°

Question

A triangle has sides measuring 15, 15, and 15 square root 2  . 
 
What are the angle measures of the triangle?
 
 A.
15°, 15°, and 21.2°
 
 B.
30°, 60°, and 90°
 
 C.
45°, 45°, and 90°
 
 D.
60°, 60°, and 60°

tukitw · Answer

From the dimensions of the triangle, you can see it's an isosceles triangle.
This means two of the angles are the same so B and D are out.
Also, the sum of the 3 interior angles of a triangle must be 180.
So, A is out too. The answer is C.

anonymous · Answer

ooohh ok :)
Thank you~!