Question

Triangle A: All sides have length 12 cm.

Triangle B: Two sides have length 10 cm, and the included angle measures 60°.
Triangle C: Base has length 15 cm, and base angles measure 40°.
Triangle D: All angles measure 60°.



Which triangle is not a unique triangle? (5 points)

a
Triangle A

b
Triangle B

c
Triangle C

d
Triangle D

Answer 1

triangle C

Explanation:

If you draw it out, it looks unique