Question

Find the area of the parallelogram whose one diagonal is 8.4 cm and perpendicular distance from an opposite vertex is 8 cm

Answer 1

Answer is 67.2 cm square

Answer 2

$area \: of \: abc + area \: of \: adc \\ = 2( \frac{1}{2} \times b \times h ) \\ = 2 (\frac{1}{2} \times 8.4 \times 8) \\ = 67.2$