Geometry

Question Analysis
This question involves identifying the contrapositive of a given statement and determining its truth value.

Key Concept Explanation:
The contrapositive of "If P, then Q" is "If not Q, then not P."
It is logically equivalent to the original statement.

Step-by-Step Solution:
Original statement: "If a shape is a square (P), then it has four equal sides (Q)."
Contrapositive: "If a shape does not have four equal sides (not Q), then it is not a square (not P)."
The contrapositive is true because it is logically equivalent to the original statement.

Option Analysis:
A: This is the converse, which is false (e.g., a rhombus has four equal sides but is not necessarily a square).
B: Correct contrapositive and true.
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