Answer:
Angle B: 135 degrees
Angle A: 60 degrees
Angle C: 75 degrees
Step-by-step explanation:
Angle B is 135 degrees
We have the complement of angle B, which is the lowest left corner of the triangle and it says 45 degrees.
So, B = 180 - 45 = 135 degrees
Angle A.
The lines crossing form 2 pair of identical angles from their tip... The exterior angle is 60 degrees, so the interior angle A is also 60 degrees.
Angle C.
Just like for angle B, we get angle C by subtracting its complement:
C = 180 - 105 = 75 degrees.
We can also validate by calculating the sum of the interior angles of the triangle: 45 + 60 + 75 = 180, which is perfect.
