Perimeter of Composite Shapes
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Perimeter of Composite Shapes
Perimeter of composite shapes worksheet: four L and U shapes with two sides not given. Work out the two missing lengths, then add all the sides. Grades 3 to 5, with an answer key.
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- Pages
- 1
- Last updated
- Time
- About 15 minutes
- Answer key
- Included
- Printing
- Black and white
- Related curriculum
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Find the area of a rectangle by counting unit squares and then by multiplying its length and width, find its perimeter by adding its sides, find a missing side, and find the area of shapes made of rectangles.
Reviewed by Ms. Olivia Parker, Teacher and Mrs. Catherine Reynolds, Teacher. How we check worksheets
How to use this sheet
- Have the child trace the outside of the shape with a finger for perimeter, and shade the inside for area.
- Ask the child to write the units each time: cm for perimeter, square cm (cm²) for area.
- For composite shapes, have the child draw a line to split the shape into rectangles first.
Common mistakes
- Mixing up area and perimeter. Perimeter goes around; area covers.
- For perimeter of a rectangle, adding only the two sides shown. A rectangle has four sides.
- Missing the sides with no number on a composite shape. Work out each missing side first.
