Mathematics for IGCSE & O level - Angles (Section 1 - No. 10) | ExamPlay

Mathematics for IGCSE & O level - Angles (Section 1 - No. 10)

What is the measure of the missing angle in a parallelogram with angles of 60°, 120°, and 60°?

30°

60°

90°

120°

解释

Opposite angles are equal. Consecutive angles are supplementary.

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