Geometry

Question Analysis:
This question involves identifying the missing premise in a logical syllogism.
The main focus is on ensuring the conclusion follows logically from the given premise.

Key Concept Explanation:
A syllogism is a deductive reasoning process consisting of:
A major premise (general rule)
A minor premise (specific case)
A conclusion (logical result)
For the syllogism to be valid, the missing premise must connect logically with both the given premise and the conclusion.

Step-by-Step Solution:
Premise 1: "All right angles measure 90 degrees." (General statement about right angles)
Premise 2: (We need to determine what fits here.)
Conclusion: "Therefore, angle ABC measures 90 degrees."
Since the conclusion states that angle ABC measures 90 degrees, the missing premise must establish that angle ABC is a right angle.

Option Analysis:
A: Incorrect—this contradicts the given conclusion.
B: Correct—this premise directly supports t...