Geometry

Question Analysis
This question tests the ability to derive the contrapositive of a statement about rectangles.

Key Concept Explanation:
The contrapositive of "If P, then Q" is "If not Q, then not P."

Step-by-Step Solution:
Original statement: "If a quadrilateral is a rectangle (P), then it has four right angles (Q)."
Contrapositive: "If a quadrilateral does not have four right angles (not Q), then it is not a rectangle (not P)."
The statement is true.

Common Mistakes:
Confusing rectangles with other quadrilaterals...