Question

Which set of angle measures CANNOT be the angle measures of a triangle?

A 120.2°, 30.8°, 29°

B 2°, 2°, 176°

C 79°, 20°, 81°

D 60°, 61°, 60°

Answer 1

D

Explanation:

As stated elsewhere, two conditions must be met.

• There are 3 angles in a triangle.
• They must add to 180

Answers A B and C all meet these 2 conditions. It is only D that gives you the problem.

It adds to 181 which is not 180. 180 is written in stone, A triangle cannot have 179 degrees, nor can it have 181 degrees.

It must have 180.

D has 181 degrees. It cannot be a triangle.