In the triangle below, the m21 = 64° and m22 = 33°, what is the m24?

Since angles 21 and 22 sum up to angle 24, we can find angle 24 by subtracting the measures of angles 21 and 22 from 180 degrees.

m24 = 180° - m21 - m22
m24 = 180° - 64° - 33°
m24 = 83°