Find the area of these quadrilaterals (Fig 11.14).

Answers (1)

(i) Area=

=\frac{1}{2}\times d\left ( h1+h2 \right )

=\frac{1}{2}\times 6\times \left ( 3+5 \right )

=3\times \left ( 8 \right )

=24 cm^{2}

(ii) Area=

=\frac{1}{2}\times d1\times \left ( d2 \right )

=\frac{1}{2}\times 7\times \left ( 6 \right )

= 7\times \left (3 \right )

= 21cm^{2}

(iii)Area= 

=\frac{1}{2}\times d\left ( h1+h2 \right )

=\frac{1}{2}\times 8\times \left ( 2+2 \right )

=4\times 4

=16 cm^{2}

 

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