Math Practice 101
Homework Explained - Math Practice 101

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Grade 8 McGraw Hill Glencoe - Answer Keys


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  Extra Practice  

Copy and Solve For Exercises 13-29, show your work and answers on a separate piece of paper.

  • Question 13 (request help)

    The surface area of a triangular prism is 300 square feet. What is the surface area of a similar prism with dimensions that are 3 times greater than the dimensions of the original prism?
  •     \(\text{ft}^{2}\)
  • Question 14 (request help)

    The surface area of a rectangular prism is 1,350 square inches. What is the surface area of a similar prism with dimensions that are 2 times greater than the dimensions of the original prism?
  •     \(\text{in.}^{2}\)
  • Question 15 (request help)

    A pyramid has a volume of 640 cubic centimeters. If the dimensions of the pyramid are reduced to one-fourth of the original dimensions, what is the volume of the new pyramid?
  •     \(\text{cm}^{3}\)
  • Question 16 (request help)

    The surface area of a rectangular prism is 1,300 square inches. Find the surface area of a similar solid that is larger by a scale factor of 3.
  •     \(\text{in.}^{2}\)
  • Question 17 (request help)

    The surface area of a triangular prism is 10.4 square meters. What is the surface area of a similar solid that is smaller by a scale factor of \(\cfrac{1}{4}\)?
  •     \(\text{m}^{2}\)
  • Question 18 (request help)

    Find the missing measures for the pair of similar solids.
  • x =    
    y =    

Reason Inductively Determine whether each statement is always, sometimes, or never true.

  • Question 19 (request help)

    Two prisms with congruent bases are similar.
  •    True
  • Question 23 (request help)

    Two similar cylinders are shown.

    a. What is the ratio of their radii?
  • Type below:
  • Question 23 (request help)

    b. What is the ratio of their surface areas? volumes?
  • Type below:
  • Question 23 (request help)

    c. Find the surface area of Cylinder B.
  •     \(\text{cm}^{2}\)
  • Question 23 (request help)

    d. Find the volume of Cylinder A.
  •     \(\text{cm}^{3}\)

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