Geometry and TrigonometryHardArea left after cutting corners from a square
Geometry and Trigonometry practice question
A square sheet of card has sides of 10 centimetres. A 2-centimetre square is cut from each of its four corners. What is the area, in square centimetres, of the card that remains?
Answer: 84
100 − 4 × 4 = 84.
Common wrong answers
- If you answered 36
- 36 is the area of the middle 6 by 6 square only.
- If you answered 92
- 92 removes two corners.
- If you answered 96
- 96 removes only one corner.
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