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Calculate the perimeter of rectangles and other polygons · Grade 4 · E2.1

Name: ______________________

Date: ______________________

  1. 1

    A rectangle is 5 cm wide and 5 cm tall. What is its perimeter, in centimetres?

    Warm-up
    5 cm5 cm

    Answer:

  2. 2

    A rectangle is 9 cm wide and 4 cm tall. What is its perimeter, in centimetres?

    Warm-up
    9 cm4 cm

    Answer:

  3. 3

    A rectangle is 6 cm wide and 7 cm tall. What is its perimeter, in centimetres?

    Warm-up
    6 cm7 cm

    Answer:

  4. 4

    A rectangle is 17 cm wide and 18 cm tall. What is its perimeter, in centimetres?

    On level
    17 cm18 cm

    Answer:

  5. 5

    A rectangle is 21 cm wide and 10 cm tall. What is its perimeter, in centimetres?

    On level
    21 cm10 cm

    Answer:

  6. 6

    A rectangle is 21 cm wide and 10 cm tall. What is its perimeter, in centimetres?

    On level
    21 cm10 cm

    Answer:

  7. 7

    A regular hexagon has 6 equal sides. Each side is 36 cm long. What is its perimeter, in centimetres?

    Challenge

    Answer:

  8. 8

    A regular hexagon has 6 equal sides. Each side is 25 cm long. What is its perimeter, in centimetres?

    Challenge

    Answer:

  9. 9

    A regular pentagon has 5 equal sides. Each side is 27 cm long. What is its perimeter, in centimetres?

    Challenge

    Answer:

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Worksheet code: eyJzIjoic3BhdGlhbC1wZXJpbWV0ZXItcmVjdGFuZ2xlIiwiZCI6WzcyMjU0OTA3OCwxNzkxNTQ5Nzg0LDE0MjEwODAxMDYsNzQ0NjQ2MTc5LDE1OTc0NDY5OTEsMTM0NTA2Mzc1MCwxMDMyNzg0NDg0LDYwMDM5MDU1NiwxMTg0MDg3MjE3XSwidiI6MX0.b77cb1be663f

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Answer key · Calculate the perimeter of rectangles and other polygons

  1. 1.
    20 — Perimeter = 2 × (width + height) = 2 × (5 + 5) = 20.
  2. 2.
    26 — Perimeter = 2 × (width + height) = 2 × (9 + 4) = 26.
  3. 3.
    26 — Perimeter = 2 × (width + height) = 2 × (6 + 7) = 26.
  4. 4.
    70 — Perimeter = 2 × (width + height) = 2 × (17 + 18) = 70.
  5. 5.
    62 — Perimeter = 2 × (width + height) = 2 × (21 + 10) = 62.
  6. 6.
    62 — Perimeter = 2 × (width + height) = 2 × (21 + 10) = 62.
  7. 7.
    216 — Perimeter = number of sides × side length = 6 × 36 = 216.
  8. 8.
    150 — Perimeter = number of sides × side length = 6 × 25 = 150.
  9. 9.
    135 — Perimeter = number of sides × side length = 5 × 27 = 135.