A rectangle is 20 cm long and 5 cm wide. What is its perimeter?
Answer and explanation
Correct answer: D. 50 cm
- Step 1: Perimeter = 2 x (length + width). Step 2. 2 x (20 + 5) = 50 cm. Answer: 50 cm. Why not the others: 100 cm: this is the area, not the perimeter. 25 cm: only one length and one width were added. 200 cm: the area was doubled.
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