Question

congruent triangles (topic 5)
which of the following cannot be used to prove that two triangles are congruent?
asa
hl
aaa
sss

Explanation:

ASA (Angle - Side - Angle) means two angles and the included side of one triangle are equal to the corresponding parts of another triangle, which can prove congruence. HL (Hypotenuse - Leg) is for right - angled triangles where the hypotenuse and one leg of one right - triangle are equal to the hypotenuse and one leg of another right - triangle, proving congruence. SSS (Side - Side - Side) means all three sides of one triangle are equal to the three sides of another triangle, proving congruence. However, AAA (Angle - Angle - Angle) only shows that the three angles of one triangle are equal to the three angles of another triangle. Two triangles with the same angles can be similar but not necessarily congruent as their side lengths can be different.

Answer:

C. AAA