4th Grade Math (Grade 4) · Chapter 10 · Lesson 10.10 · Printable PDF

Finding a Missing Side from the Area Worksheet with Answer Key

6 problems on finding a missing side from the area: rectangles with a given area, a patio, rectangles with a given perimeter, a framed square photo, two carpets, and checking Liam's mistake. 2 pages, with a worked answer key.

6 problems2 pagesanswer key
Printable Finding a missing side from the area worksheet with answer key - 4th Grade Math (Grade 4) (Page 1 PDF preview)
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What's on the worksheet

  1. Find the other side of each rectangle from its area and one side, writing the unit:
    48 square meters, one side 6 m63 square feet, one side 7 ft96 square inches, one side 8 in160 square feet, one side 8 ft350 square centimeters, one side 5 cm
  2. Word problem: how long is the patio along the wall of the house?
  3. Find the other side of each rectangle from its perimeter and one side:
    Perimeter 30 ft, one side 9 ftPerimeter 52 m, one side 18 mPerimeter 70 cm, one side 20 cmPerimeter 44 in, one side 13 in
  4. Mia's square photo: find the side of the photo and the side of the frame.
  5. Omar's and Grace's bedroom carpets: find the length of each room.
  6. Check Liam's answer for the other side of a 56 square foot rectangle and find his mistake.

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Finding a missing side from the area: the lesson ›