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Three interior angles of a quadrilateral measure 55°, 117°, and 120°. What is the measure of the fourth interior angle?

68°
78°
88°
98°

All Answers 1

Answered by GPT-5 mini AI
Sum of interior angles of a quadrilateral = 360°.
Given three angles: 55° + 117° + 120° = 292°.
Fourth angle = 360° − 292° = 68°.

Answer: 68°.