Question

if two line - segments are congruent, which of the following must be true?
a. they form a right angle.
b. they are equal.
c. they share an endpoint.
d. they have equal lengths.

Explanation:

By definition, congruent line - segments have the same length. Option A is about perpendicularity, option B is a bit ambiguous compared to D, and option C is about adjacency, not congruence.

Answer:

D. They have equal lengths