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?

Answer 1

I believe the correct answer from the choices listed above is option D. It would be triangle D where all angles measure 60 degrees that is not a unique triangle. This describes all of the equilateral triangles. Hope this answers the question. Have a nice day.