Find a missing side from the area
Use the area and the side you know to find the other side. Write the number only.
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A rectangle has an area of 20 square m and is 4 m long. How wide is it? Write the number only.
Answer: 5
A rectangular card has an area of 6 square m and is 2 m long. How wide is it? Write the number only.
Answer: 3
A rectangular banner has an area of 8 square cm and is 4 cm long. How wide is it? Write the number only.
Answer: 2
Tip: Use the area and the side you know to find the other side. Write the number only.
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Curriculum
Common Core: 3.MD.C.7, 3.MD.D.8
Print a free worksheet with answers (20 questions).
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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