Skill 1 of 9 · GeometryClose

Side lengths of shapes when given the area or perimeter

Find the side lengths of triangles, rectangles, and polygons when given the area or perimeter.

  • You will be given the math formulas on the test.
  • Rectangle area A = l × w, so a missing side is A ÷ (known side).
  • Rectangle perimeter P = 2l + 2w, so w = (P − 2l) ÷ 2.

Question 1 of 4

A rectangle has an area of 54 square inches and a length of 6 inches. What is the width, in inches, of the rectangle?

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