Comparing Circles and Ratios Exercise

Comparing Circles and Ratios

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Comparing Circles and Ratios

Compare measurements of different circles and analyze ratios of radius, diameter, circumference, and area. Practice understanding proportional relationships in circles.

Questions

  1. MultiChoice

    If the radius of a circle is doubled, what happens to its circumference?

  2. MultiChoice

    If the radius of a circle is doubled, what happens to its area?

  3. MultiChoice

    Circle A has radius 3 cm and Circle B has radius 6 cm. What is the ratio of Area A to Area B?

  4. MultiChoice

    Circle A has radius 4 cm and Circle B has radius 8 cm. What is the ratio of Circumference A to Circumference B?

  5. MultiChoice

    If the radius of a circle is tripled, by what factor does its area increase?

  6. MultiChoice

    Circle X has diameter 10 cm, Circle Y has diameter 20 cm. How many times larger is the area of Y than X?

  7. MultiChoice

    If the circumference of a circle is 10pi cm, what is its area in terms of pi?

  8. MultiChoice

    If the circumference of a circle is 16pi cm, what is its radius?

  9. MultiChoice

    How many times larger is the circumference of a circle with r = 10 cm compared to one with r = 5 cm?

  10. MultiChoice

    If the area of a circle is 81pi sq cm, what is its circumference in terms of pi?

  11. MultiChoice

    If the radius of a circle is cut in half, what happens to its area?

  12. MultiChoice

    Area of Circle A is 100pi and Area of Circle B is 25pi. What is the ratio of radius A to radius B?