18. The perimeter of a trapezium is 52 cm and
its each non-parallel side is equal to 10 cm
with its height 8 cm. It area is
27
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Step-by-step explanation:
Perimeter =52 cm
⇒AB+BC+CD+DA=52
⇒AB+10+CD+10=52
⇒AB+DC=32cm
Area of trap =1/2(AB+DC)×AM=
1/2×32×8=128cm2
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