Math Practice 101
Homework Explained - Math Practice 101

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Grade 7 McGraw Hill Glencoe - Answer Keys
Chapter 8: Measure Figures; Lesson 2: Area of Circles


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Find the area of each circle. Round to the nearest tenth. Use 3.14 or \(\frac{22}{7}\) for \(\pi\).

  • Question 24 (request help)

    radius =\(3\frac{4}{5}\) ft
  • \(A=\)    \(ft^2\)
  • Question 26 (request help)

    Find the area of the Girl Scout patch shown if the diameter is 1.25 inches. Round to the nearest tenth.
  • \(A=\)    \(in^2\)

Find the area of each semicircle. Round to the nearest tenth. Use 3.14 for \(\pi\).

  • Question 30 (request help)

    A window that is in the shape of a semicircle has a diameter of 28 inches. Find the area of the window. Round to the nearest tenth.
  • \(A=\)    \(in^2\)
  • Question 31 (request help)

    Justify Conclusions Which has a greater area, a triangle with a base of 100 feet and a height of 100 feet or a circle with diameter of 100 feet? Justify your selection.
  • Circle area    Triangle area
  • Question 32 (request help)

    A radio station sends a signal in a circular area with an 80-mile radius. Find the approximate area in square kilometers that receives the signal. (Hint: 1 square mile \(\approx\)2.6 square kilometers)
  •    \(km^2\)

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