Q8 of 83 Page 356

In the given figure, ABCD is a ‖gm in which DL ⊥ AB. If AB = 10cm and DL = 4cm, then the ar(‖gm ABCD) = ?

Area of parallelogram is: base × height

Here,

Base = AB = 10cm

Height = DL = 4cm

∴ ar(‖gm ABCD) = AB ×DL = 10×4 = 40cm²

∴ ar(‖gm ABCD) = 40cm²

In the given figure, ABCD is a ‖gm in which AB = CD = 5cm and BD⊥DC such that BD = 6.8cm. Then, the area of ‖gm ABCD = ?

In the given figure, ABCD is a ‖gm in which diagonals AC and BD intersect at O. If ar(‖gm ABCD) is 52cm², then the ar(∆OAB) = ?

In ‖gm ABCD, it is given that AB = 10cm, DL ⊥ AB and BM ⊥ AD such that DL = 6cm and BM = 8cm. Then, AD = ?

The lengths of the diagonals of a rhombus are 12cm and 16cm. The area of the rhombus is