Binocular cues include stereopsis, eye convergence, disparity, and yielding depth from binocular vision through exploitation of parallax. Monocular cues include size: distant objects subtend smaller visual angles than near objects, grain, size, and motion parallax.
157.1 cm ^2 , because the small shaded semicircle equals the other small unshaded semicircle. So it’s the area of half the circle.
