Mathematics for IGCSE & O level - Angles (Section 1 - No. 21) | ExamPlay

Mathematics for IGCSE & O level - Angles (Section 1 - No. 21)

If two lines are parallel and cut by a transversal, the co-interior angles are:

Equal

Supplementary

Complementary

Vertical

Explanation

Co-interior angles add up to 180° (supplementary).

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