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

Name: ______________________

Date: ______________________

1
A rectangle is 7 cm wide and 3 cm tall. What is its perimeter, in centimetres?
Warm-up
Answer:
2
A rectangle is 5 cm wide and 6 cm tall. What is its perimeter, in centimetres?
Warm-up
Answer:
3
A rectangle is 6 cm wide and 7 cm tall. What is its perimeter, in centimetres?
Warm-up
Answer:
4
A rectangle is 24 cm wide and 12 cm tall. What is its perimeter, in centimetres?
On level
Answer:
5
A rectangle is 20 cm wide and 18 cm tall. What is its perimeter, in centimetres?
On level
Answer:
6
A rectangle is 11 cm wide and 24 cm tall. What is its perimeter, in centimetres?
On level
Answer:
7
A regular pentagon has 5 equal sides. Each side is 34 cm long. What is its perimeter, in centimetres?
Challenge
Answer:
8
A regular hexagon has 6 equal sides. Each side is 32 cm long. What is its perimeter, in centimetres?
Challenge
Answer:
9
A regular triangle has 3 equal sides. Each side is 12 cm long. What is its perimeter, in centimetres?
Challenge
Answer:

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Worksheet code: eyJzIjoic3BhdGlhbC1wZXJpbWV0ZXItcmVjdGFuZ2xlIiwiZCI6Wzc3MTg0NTAyNCw5MjY5Njk1ODUsOTM1MjMwMDQ1LDUwNjQxNDkwOSwxMTUyNTM1MjU3LDE3OTg3NDgwMDIsMTg5NzA2MzEzLDM2OTc2NDg0NCwxMDMyODEyMDk3XSwidiI6MX0.413aeaccfddf

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Answer key · Calculate the perimeter of rectangles and other polygons

1.
20 — Perimeter = 2 × (width + height) = 2 × (7 + 3) = 20.
2.
22 — Perimeter = 2 × (width + height) = 2 × (5 + 6) = 22.
3.
26 — Perimeter = 2 × (width + height) = 2 × (6 + 7) = 26.
4.
72 — Perimeter = 2 × (width + height) = 2 × (24 + 12) = 72.
5.
76 — Perimeter = 2 × (width + height) = 2 × (20 + 18) = 76.
6.
70 — Perimeter = 2 × (width + height) = 2 × (11 + 24) = 70.
7.
170 — Perimeter = number of sides × side length = 5 × 34 = 170.
8.
192 — Perimeter = number of sides × side length = 6 × 32 = 192.
9.
36 — Perimeter = number of sides × side length = 3 × 12 = 36.