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
30 tutor-authored questions for this Ontario curriculum expectation, ordered easiest to hardest, every one with a full worked solution. Work through all 30 with your weekly-lesson access code.
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 circular pond with radius 12m is surrounded by a circular path 3m wide (so the path's outer radius is 15m). Find the area of just the path (not the pond).
Solution shown after you try it in practice mode.
Work through all 30, easiest to hardest
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