Question

the sum of two angles of a triangle is equal to its third angle. determine the measure of third angle.

Answer 1

Let the first angle be a and second angle be b.

Third angle = a + b

Sum of all angles of the triangle are 180°

a + b +( a + b) = 180°
2a + 2b = 180°
a + b = 90°

Therefore,
Third angle = 90°

Final answer- The measure of the third angle is 90°