Find a missing side from the perimetre
Use the perimetre and the side you know to find the other side. Write the number only.
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A rectangular garden has a perimeter of 26 cm and is 6 cm long. How wide is it? Write the number only.
Answer: 7
A rectangular rug has a perimeter of 20 m and is 5 m long. How wide is it? Write the number only.
Answer: 5
A rectangular garden has a perimeter of 20 cm and is 6 cm long. How wide is it? Write the number only.
Answer: 4
Tip: Use the perimetre and the side you know to find the other side. Write the number only.
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On paper: this skill is in the printable pack Grade 3 Common Core Math: Geometry and Measurement, with an answer key.
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