Around 0.02 or more precise, 0.02083
Answer:
total ground and wall angle is 90°
beam angle with ground= 51
beam angle with wall =39
because total angle=angle with ground + angle with wall
angle with wall=total angle-angle with ground
angle with wall= 90-51=39
Answer:
The yellow polygon is the scaled version of the red one (scaled by 3×), so the variable w = 9
That parts are equal to each other.
