Question

Which of the following is not the criterion for the congruency of two triangles?

Options

• SAS

• SSS

• RHS

• ASS

Answer 1

ASS

Explanation:

ASS also written SSA, two sides and a non‑included angle is not a valid congruence criterion because the given angle is not the one between the two given sides.

With two sides and a non‑included angle, you can often construct two different noncongruent triangles or none at all, the ambiguous case, so congruence is not guaranteed.

The valid criteria are SSS, SAS, ASA, AAS and RHS.