Question

In a parallelogram ABCD, O is the midpoint of intersection of diagonals and OC=$3cm$, OB=$6cm$. What is AC and BD respectively?

• A. $4cm,6cm$
• B. $6cm,12cm$
• C. $2cm,4cm$
• D. $3cm,6cm$

Answer 1

The correct option is B

$6cm,12cm$

The diagonals of a parallelogram bisect each other. Thus, $AC=2\times OC$ and $BD=2\times OB$.

$\therefore AC=2\times 3=6cm$ and
$BD=2\times 6=12cm$.