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Which of the following could be the measures of the three angles of a triangle?

(1) 40°, 90°, 60°
(3) 120°, 30°, 20°
(2) 50°, 100°, 30°
(4) 70°, 70°, 60°

1 Answer

5 votes

Answer:

Explanation:

The sum of three angles in a triangle is equal to 180°.

(1) 40°, 90°, 60°

40 + 90 + 60 = 190. Therefore, it could not be the measures of the three angles if a triangle.

(3) 120°, 30°, 20°

120 + 30 + 20 = 170. Therefore, it could not be the measures of the three angles if a triangle.

(2) 50°, 100°, 30°

50 + 100 + 30 = 180. Therefore, it could be the measures of the three angles if a triangle.

(4) 70°, 70°, 60°

70 + 70 + 60 = 200. Therefore, it could not be the measures of the three angles if a triangle.

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