Use the relationships between the radius, diameter, and circumference of a circle to explain the formula for finding the circumference 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
A circle's radius is 5cm. What is its diameter?
📘 Worked solution
✓10cm.
And one from the hard end
A circular race track has a circumference of 1099m. If the track's radius must be a whole number of metres, find the radius (round to the nearest whole metre) and verify by recomputing the circumference.
Solution shown after you try it in practice mode.
Work through all 30, easiest to hardest
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