Question

Two angles of a triangle measure 55° and 20°.

What is the measure of the third angle of the triangle?
A. 159
B. 90°
O C. 1050
D. 2859
HELP

Answer 1

180 because three angles of a triangle always add up to 180

Answer 2

The three angles of a triangle always add up to 180.

Therefore, we have the equation:

55+20+x=180.

Solving for x, we get x=105.

So the answer is C.

Hope this helps! :D