If one angle of a triangle measures 120 degrees, what is the sum of the measures of the other two angles?

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Multiple Choice

If one angle of a triangle measures 120 degrees, what is the sum of the measures of the other two angles?

The main idea is that the interior angles of any triangle add up to 180 degrees. If one angle is 120, the other two must sum to the remaining 60 degrees to reach 180. So the sum of the other two angles is 60 degrees. The two angles could be, for example, 30 and 30, or 10 and 50, as long as they add to 60. The totals 120, 180, or 360 would not fit the 180-degree rule for a triangle.

The main idea is that the interior angles of any triangle add up to 180 degrees. If one angle is 120, the other two must sum to the remaining 60 degrees to reach 180. So the sum of the other two angles is 60 degrees. The two angles could be, for example, 30 and 30, or 10 and 50, as long as they add to 60. The totals 120, 180, or 360 would not fit the 180-degree rule for a triangle.

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