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7th Grade Math (Math 7) · Chapter 9 · Lesson 9.1 · Printable PDF

Radius and Diameter Worksheet with Answer Key

7 problems on radius and diameter: finding one from the other, measuring across a metal cover, the band width of a washer, the largest circle cut from plywood, circles on a number line, fitting a circle in a rectangle, and touching circles. 2 pages, with a worked answer key.

7 problems2 pagesanswer key
Printable Radius and diameter worksheet with answer key - 7th Grade Math (Math 7) (Page 1 PDF preview)
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What's on the worksheet

  1. Find the missing length of each circle and give the unit.
    r = 4.35 cm; find d.d = 7.4 m; find r.d = 5\dfrac{1}{2} in; find r.r = 3\dfrac{5}{8} in; find d.d = 0.9 km; find r.
  2. Find which of Mei's four readings across a metal cover is the diameter.
  3. Find the width of the band of metal in a washer.
  4. Find the radius of the largest circle cut from a sheet of plywood.
  5. Find where a circle on a number line crosses the line.
  6. Decide if a circle of radius 6 cm fits in a rectangle and how wide it must be.
  7. Find the radii of two touching circles from the distance between centers.

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The free lesson teaches it with worked examples and practice problems.

Radius and diameter: the lesson ›

More Chapter 9 worksheets: Circles: circumference and area