Question

Which sets of values can be the measures of the exterior angles of a triangle?

120°, 110°, 130°
35°, 103°, 122°
123°, 87°, 220°
120°, 120°, 120°
123°, 157°, 90°
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the answer is 120, 110, 130 and 120, 120, 120 ;)

Answer 1

120°, 110°, 130°

120°, 120°, 120°

Explanation:

The sum of the exterior angles of a triangle = 360

120 + 110 + 130 = 360 OK

35 + 103 + 122 = 260 these cannot be the exterior angles of the triangle

123 + 87 + 220 = 430 these cannot be the exterior angles of the triangle

120 + 120 + 120 = 360 OK

123 + 157 + 90 = 370 these cannot be the exterior angles of the triangle