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⭕ Circles

Diameter & Radius

Diameter = 2 × radius

Grade 5 · Diameter & Radius

Easy 20 questions Worksheet #69652 For Diameter & Radius

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MathDigits Worksheet

Grade 5 · Diameter & Radius

Easy · 20 questions · Worksheet #69652 · Diameter & Radius

Name: ________________________

Date: ______________ Score: ______

  1. fill If radius r = 33, find the diameter. (d = 2r)
    ______________________________
  2. fill If diameter d = 96, find the radius. (r = d/2)
    ______________________________
  3. fill If diameter d = 26, find the radius. (r = d/2)
    ______________________________
  4. fill If radius r = 34, find the diameter. (d = 2r)
    ______________________________
  5. fill If radius r = 44, find the diameter. (d = 2r)
    ______________________________
  6. fill If radius r = 57, find the diameter. (d = 2r)
    ______________________________
  7. fill If radius r = 80, find the diameter. (d = 2r)
    ______________________________
  8. fill If radius r = 20, find the diameter. (d = 2r)
    ______________________________
  9. fill If radius r = 58, find the diameter. (d = 2r)
    ______________________________
  10. fill If diameter d = 102, find the radius. (r = d/2)
    ______________________________
  11. fill If radius r = 39, find the diameter. (d = 2r)
    ______________________________
  12. fill If radius r = 25, find the diameter. (d = 2r)
    ______________________________
  13. fill If radius r = 29, find the diameter. (d = 2r)
    ______________________________
  14. fill If diameter d = 64, find the radius. (r = d/2)
    ______________________________
  15. fill If radius r = 47, find the diameter. (d = 2r)
    ______________________________
  16. fill If radius r = 75, find the diameter. (d = 2r)
    ______________________________
  17. fill If diameter d = 16, find the radius. (r = d/2)
    ______________________________
  18. fill If diameter d = 110, find the radius. (r = d/2)
    ______________________________
  19. fill If radius r = 64, find the diameter. (d = 2r)
    ______________________________
  20. fill If diameter d = 128, find the radius. (r = d/2)
    ______________________________

Updated July 2026

FAQs

What is Diameter & Radius?

Diameter & Radius (diameter radius) is a circles relationship written as Diameter = 2 × radius or d = 2r. Students use it to solve unknowns when enough values are known.

How do you calculate Diameter & Radius step by step?

Write Diameter = 2 × radius, substitute the known numbers carefully, then simplify. Worked walkthrough: r = 7 d = 14.

When is Diameter & Radius taught in school?

Diameter & Radius usually appears in circles units during middle or secondary school. Match difficulty with MathDigits grade worksheets so practice fits the curriculum year.

What is a real example of Diameter & Radius?

On this page the worked result is d = 14. Generate a formula worksheet below for more unique practice sets.

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