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

(a) $17c{m}^2$

(b) $25c{m}^2$

(c) $34c{m}^2$

(d) $68c{m}^2$

In the given figure, ABCD is a quadrilateral.

If $AB=30cm,$, $AD=18cm,$, $BD=24cm,$, $DC=26cm$ and $\angle DBC={90}^{\circ }$,

then the area of quadrilateral $ABCD$ = ____ $c{m}^2$

Construct a parallelogram ABCD in which AB = 4.3 cm, AD = 4 cm and BD = 6.8 cm.