Section A Section A Checkpoint

Problem 1

What are the possible side lengths of a rectangle with area 10 square units?

Draw an example of each possible rectangle on the grid.

blank grid of 12 by 12.

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Solution

2 units by 5 units, or 1 unit by 10 units. Sample response:

Grid. Two rectangles.

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Sample Response

2 units by 5 units, or 1 unit by 10 units. Sample response:

Grid. Two rectangles.

Problem 2

Select all true statements.

A
 5 is a factor of 35.
B
 35 is a factor of 5.
C
 5 is a multiple of 35.
D
 35 is a multiple of 5.

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Solution
A, D
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Sample Response
A, D

Problem 3

  1. Is 17 a prime number or a composite number? Explain how you know.
  2. Is 21 a prime number or a composite number? Explain how you know.
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Solution
  1. Prime, because it has only one factor pair, 1 and 17.
  2. Composite, because it has more than one factor pair.
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Sample Response
  1. Prime, because it has only one factor pair, 1 and 17.
  2. Composite, because it has more than one factor pair.