Geometry and TrigonometryEasyArea of a doormat
Geometry and Trigonometry practice question
A rectangular doormat is 7 decimetres long and 3 decimetres wide. What is its area, in square decimetres?
Answer: 21
7 × 3 = 21.
Common wrong answers
- If you answered 10
- 10 adds the sides.
- If you answered 20
- 20 is the perimeter.
- If you answered 42
- 42 doubles the area.
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