Question

what does it mean if diagonals are perpendicular (⊥)? they bisect the vertex where they intersect is a 90° angle they are equal

Explanation:

Perpendicular lines form a 90 - degree angle at their intersection. When the diagonals of a polygon are perpendicular, the angle where they cross is 90°. Bisecting the vertex is a different property, and diagonals being equal is unrelated to perpendicularity.

Answer:

Where they intersect is a 90° angle