Math Practice 101
Homework Explained - Math Practice 101

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Grade 7 HMH Go Math - Answer Keys


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  • Question 9 (request help)

    The radius of the circle is given in meters. What is the circumference of the circle? Use 3.14 for \(\text{π}\).
    • \(25.12\text{ m}\)
    • \(50.24\text{ m}\)
    • \(200.96\text{ m}\)
    • \(803.84\text{ m}\)
  • Question 10 (request help)

    The dimensions of the figure are given in millimeters. What is the area of the two-dimensional figure?
    • \(39\text{ mm}^2\)
    • \(169\text{ mm}^2\)
    • \(208\text{ mm}^2\)
    • \(247\text{ mm}^2\)
  • Question 11 (request help)

    A forest ranger wants to determine the radius of the trunk of a tree. She measures the circumference to be 8.6 feet. What is the trunk’s radius to the nearest tenth of a foot?
    • 1.4 ft
    • 2.7 ft
    • 4.3 ft
    • 17.2 ft
  • Question 12 (request help)

    What is the measure in degrees of an angle that is supplementary to a 74° angle?
    • 16°
    • 74°
    • 90°
    • 106°
  • Question 13 (request help)

    What is the volume in cubic centimeters of a rectangular prism that has a length of 6.2 centimeters, a width of 3.5 centimeters, and a height of 10 centimeters?
    • \(19.7\text{ cm}^3\)
    • \(108.5\text{ cm}^3\)
    • \(217\text{ cm}^3\)
    • \(237.4\text{ cm}^3\)
  • Question 14 (request help)

    A patio is the shape of a circle with diameter shown.

    What is the area of the patio? Use 3.14 for \(\text{π}\).
    • \(9\text{ m}^2\)
    • \(28.26\text{ m}^2\)
    • \(254.34\text{ m}^2\)
    • \(1017.36\text{ m}^2\)
  • Question 15 (request help)

    Petra fills a small cardboard box with sand. The dimensions of the box are 3 inches by 4 inches by 2 inches.

    a. What is the volume of the box?
  •     \(\text{ in}^3\)
  • Question 15 (request help)

    b. Petra decides to cover the box by gluing on wrapping paper. How much wrapping paper does she need to cover all six sides of the box?
  •     \(\text{ in}^2\)
  • Question 15 (request help)

    c. Petra has a second, larger box that is 6 inches by 8 inches by 4 inches. How many times larger is the volume of this second box? The surface area?
  • Volume is     times greater.
    Surface area is     times greater

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