Geometry

Question Analysis:
This question tests the basic structure of contradiction proofs.
The focus is on identifying correct assumptions at the start of the proof.

Key Concept Explanation:
In contradiction, you assume the statement is false or that the conclusion does not hold.
You then reason until a contradiction is reached.

Step-by-Step Solution:
Suppose we want to prove: “If p, then q.”
Contradiction method: Assume p is true, and q is false.
Use this assumption to deduce something impossible → contradiction.

Common Mistakes:
Mixing up dire...