The parallel sides of a trapezium are 40 cm and 20 cm. If the non parallel sides are equal it being 26 cm, find the area of a trapezium.
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Answer:
692
Step-by-step explanation:
construction:draw perpendicular to base
in triangle ABE by Pythagoreas theorm
AB^2=BE^2+AE^2
20^=10^2+AE^2
400=100+AE^2
AE^2=400-100
AE^2=300
AE=17.3
In trapezium ABCD
40×17.3
692unit^2
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