The measures of 2 of the angles of a triangle are 75° and 65°, what is the measure of the 3rd angle?
90°
50°
30
40°

40

Step-by-step explanation:

add 75+65, getting 140.

Triangle means you have to get to 180 degrees.

subtracting 140 from 180 gives you 40

3rd angle=40

none of the above.

for one of the equations to be used in the process, there has to be a term in the equation since squared is .

since there is only a term in the first equation, we cannot derive a from completing the square.

solving with completing the square