Question:
In the given figure, ABCD is a || gm in which AB = CD = 5 cm and BD ⊥ DC such that BD = 6.8 cm. Then, the area of || gm ABCD = ?
(a) $17 \mathrm{~cm}^{2}$
(b) $25 \mathrm{~cm}^{2}$
(c) $34 \mathrm{~cm}^{2}$
(d) $68 \mathrm{~cm}^{2}$
Solution:
(c) 34 cm2
ar(parallelogram ABCD) = base × height = 5 × 6.8 = 34 cm2