Geometry and TrigonometryMediumArea of a trapezium-shaped sign
Geometry and Trigonometry practice question
A road sign is a trapezium with parallel sides of 5 and 11 decimetres, which are 4 decimetres apart. What is the area of the sign, in square decimetres?
Answer: 32
(1/2)(5 + 11)(4) = 32.
Common wrong answers
- If you answered 20
- 20 uses 5 × 4.
- If you answered 44
- 44 uses 11 × 4.
- If you answered 64
- 64 forgets the 1/2.
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