I don’t understand I need help

It's a right triangle so you need to use Pythagorean to find the missing side and then use it to find the angle.

Missing side: 63.2142

Angle is 4.7184 ; other angle is 85.281 but it's not relevant to the answer

answer rather than having to add and subtract the measurements of the semi-circle, notice that the semicircle to the left of ad is actually identical in area to the blank semicircle-shaped space to the left of bc. so if we transferred the red semicircle into the blank space, we would end up with a square of side length 24 cm. the area of a square is s^2 = 24^2 = 676 cm^2.

u also answered this so i think u would know but i am here to

put in or use mine

-2

7 - 9 = -2

reversed:

-2 + 9 = 7