Question

Which set of three angles could represent the interior angles of a triangle?

19 degrees, 70 degrees, 91 degrees
47 degrees, 12 degrees, 31 degrees
50 degrees, 20 degrees, 20 degrees
25 degrees, 25 degrees, 100 degrees

Answer 1

19, 70, 91

Explanation:

19 + 70 + 91 = 180. Everything else doesn't add up to 180.

Answer 2

19 degrees, 70 degrees, 91 degrees

Explanation:

to make an interior angle of a triangle you need to make a 180-degree triangle and 19+70+91 make 180 degrees