If you perceive any 90-degree right angles in the cube depicted, it is because of the perceptual principle called:

Question

Quizplus · Accepted Answer

The perceptual principle of shape constancy allows us to recognize the shape of an object even when it is viewed from different angles. In the case of the cube depicted, the right angles are perceived because of this principle. The other options, such as size constancy and visual acuity, are not relevant to the perception of right angles. The Müller-Lyer illusion involves the perception of line lengths, not angles.

If You Perceive Any 90-Degree Right Angles in the Cube