Explanation:
32 seems to be the tangent on the circle with radius 24.
so, 32 and 24 are right-angled to each other (90°).
therefore, we can use Pythagoras to calculate x.
c² = a² + b²
with c being the Hypotenuse (the side opposite of the 90° angle).
in our case
x² = 24² + 32² = 576 + 1024 = 1600
x = 40