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Showing 1 question in Mathematics for Class 8. Tap a card to reveal the answer.
MathematicsMensurationmediumFind the area of a trapezium whose parallel sides are 12 cm and 8 cm and whose height is 5 cm.
Reveal answer ↓
What it is
A trapezium's area is the average of its two parallel sides times the height.
Answer
Area of a trapezium = (1/2) x (sum of parallel sides) x height = (1/2) x (12 + 8) x 5 = (1/2) x 20 x 5 = 50 square cm.
Area = (1/2)(a + b) x h
- •Area = (1/2)(a + b) h
- •= (1/2)(12 + 8)(5)
- •= 50 cm^2
Why learn this
It measures real shapes - fields, plots and cross-sections that are not perfect rectangles.
💡 Memory trick
Half the sum of the parallel sides, times the height: (1/2)(a + b) h.