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If $ h=10 \mathrm{cm}, c=6 \mathrm{cm}, b=12 \mathrm{cm}, d=4 \mathrm{cm}, $ find the values of each of its parts separately and add to find the area WXYZ. Verify it by putting the values of $ h, a $ and $ b $ in the expression $ \frac{h(a+b)}{2} $.
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Given : In the above figure,
To do : Find area of Trapezium using two different methods.
By dividing the trapezium into separate parts:
Area of trapezium WXYZ = Area of triangle with base'c'+area of rectangle +area of triangle with base 'd'
=
=
=
=
By using the given expression:
Here a = b + c + d
= 12 + 6 + 4
=22 cm
Area of WXYZ as per the expression
=
=
=
=
From both methods, we got same answer. Hence, verified
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