Show the relationships between the radius, diameter, and area of a circle, and use these relationships to explain the formula for measuring the area of a circle and to solve related problems
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
Find the area of a circle with radius 5cm (A=πr², π≈3.14).
📘 Worked solution
✓78.5cm².
And one from the hard end
A circle has an area of 379.94cm². Find its radius.
Solution shown after you try it in practice mode.
Work through all 10, easiest to hardest
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