Use the properties of supplementary, complementary, opposite, and interior and exterior angles to solve for unknown angle measures
10 tutor-authored questions for this Ontario curriculum expectation, ordered easiest to hardest — every one with a full worked solution. Work through them free, no account needed.
Sample: the first question, solved
One angle is 150°. Find its supplementary angle.
📘 Worked solution
✓30°.
And one from the hard end
One angle is 112.5°. Find its supplementary angle.
Solution shown after you try it in practice mode.
Work through all 10, easiest to hardest
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