PQRS is a parallelogram (Fig 11.23). QM is the height from Q to SR and QN is the height from Q to PS. If SR = 12 cm and QM = 7.6 cm. Find: (a) the area of the parallegram PQRS (b) QN, if PS = 8 cm
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Area of parallelogram is 91.2 cm² and length of QN is 11.4 cm
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Answer:
We have,
given that,
QM as height = 7.6 c.m
SR as base = 12 c.m
We know that,
(i) Area of parallelogram = Base × Height
SR×QM
=12×7.6
Area of parallelogram = 91.2c.m
2
(ii) find QN, if PS = 8 c.m.
According to the given figure.
Base PS = 8 c.m
Height QN = ?
We know that,
Area of parallelogram = PS×QN
91.2=8×QN
QN=
8
91.2
QN=11.4c.m
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