Around a point, four angles sum to 360 degrees. If the three angles are 120°, 60°, and 60°, what is the measure of the fourth angle?

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Master the Certify Teacher EC-6 (391) Mathematics Test. Use flashcards and multiple choice questions with explanations. Boost your confidence and excel in your exam!

Multiple Choice

Around a point, four angles sum to 360 degrees. If the three angles are 120°, 60°, and 60°, what is the measure of the fourth angle?

Explanation:
Angles around a point sum to 360 degrees. The three given angles add up to 120 + 60 + 60 = 240 degrees. Subtracting from 360 gives 360 − 240 = 120 degrees. So the fourth angle measures 120 degrees, which is the option that shows 120°.

Angles around a point sum to 360 degrees. The three given angles add up to 120 + 60 + 60 = 240 degrees. Subtracting from 360 gives 360 − 240 = 120 degrees. So the fourth angle measures 120 degrees, which is the option that shows 120°.

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