Radius And Diameter

5 Questions | Total Attempts: 427

Settings
Please wait...
Radius Quizzes & Trivia

You must be able to change the diameter to a radius in order to find the area of a circle. Practice that skill now. Remember that inorder to change a radius to a diameter you MULTIPLY by 2. To change a diameter to a radius you DIVIDE by 2.


Questions and Answers
  • 1. 
    A circle has a radius of 10 cm, what is the diameter of the circle?
    • A. 

      5 cm

    • B. 

      20 cm

    • C. 

      10 cm

    • D. 

      12 cm

  • 2. 
    A circle has a diameter of 30 in, what is the radius of this circle?
    • A. 

      15 in

    • B. 

      60 in

    • C. 

      10 in

  • 3. 
    Max has a plate with a diameter of 25 inches.  For Max to find the area of the plate he has to know the radius, what is the radius of the plate?
    • A. 

      12 in

    • B. 

      50 in

    • C. 

      12.5 in

  • 4. 
    Sue has a bicycle wheel with a radius of 6.5 in.  What is the diameter of Sue's wheel?
    • A. 

      65 in

    • B. 

      13 in

    • C. 

      3.25 in

    • D. 

      3 in

  • 5. 
    Payton has a yo-yo with a diameter of 4 cm, what is the radius of the yo-yo?
    • A. 

      4 cm

    • B. 

      8 cm

    • C. 

      2 cm