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Grade 7 math · U.4 · Area of plane figures

Area of an L-shaped figure

Find the area of each rectangle and add them.

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  1. An L-shaped floor is made from a 7 m by 7 m rectangle joined to a 9 m by 10 m rectangle, with no overlap. What is the total area in m²?

    Answer: 139

  2. An L-shaped floor is made from a 10 m by 5 m rectangle joined to a 4 m by 7 m rectangle, with no overlap. What is the total area in m²?

    Answer: 78

  3. An L-shaped floor is made from a 11 m by 7 m rectangle joined to a 9 m by 12 m rectangle, with no overlap. What is the total area in m²?

    Answer: 185

Tip: Find the area of each rectangle and add them.

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