Geometry

Question Analysis
This question involves identifying the contrapositive of a statement about equilateral triangles 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 triangle is equilateral (P), then all its angles are 60 degrees (Q)."
Contrapositive: "If a triangle does not have all angles equal to 60 degrees (not Q), then it is not equilateral (not P)."
The contrapositive is true because it is logically equivalent to the original statement.

Option Analysis:
A: This is the converse, which is true but not the contrapositive.
B: Correct contrapositive and tr...