Math Practice 101
Homework Explained - Math Practice 101

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Grade 7 McGraw Hill Glencoe - Answer Keys
Chapter 8: Measure Figures; Lesson 1: Circumference


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Find the radius or diameter of each circle with the given dimensions.

Find the circumference of each circle. Use 3.14 or \(\frac{22}{7}\) for \(\pi\).

  • Question 25 (request help)

    a button with a radius of 21 millimeters
  • \(C\approx\)    \(\text{mm}\)
  • Question 26 (request help)

    a dunk tank with a radius of 36 inches
  • \(C\approx\)    \(\text{in}\)
  • Question 27 (request help)

    The diameter of a music CD is 12 centimeters. Find the circumference of a CD to the nearest tenth.
  • \(C\approx\)    \(\text{cm}\)
  • Question 28 (request help)

    At a local park, Sara can choose between two circular paths to walk. One path has a diameter of 120 yards, and the other has a radius of 45 yards. How much farther can Sara walk on the longer path than the shorter path if she walks around the path once?
  •    \(\text{yds}\)
  • Question 29 (request help)

    Identify Repeated Reasoning The diagram at the right is made up of circles with the same center. The innermost circle has a diameter of 1 unit. Each circle moving outward has a diameter one more unit than the previous. Without calculating, how much longer is the circumference of each circle?
  • Type below:

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