Question

In parallelogram $ABCD$, its diagonals $\overline{AC}$ and $\overline{BD}$ intersect at $O$. If $AO=5cm$ then $AC=$ ____________ cm.

Answer 1

$ABCD$ is a parallelogram.

$AC$ and $BD$ bisect each other at point $O.$

Where, $AO=5cm$

Then, $AO=CO$

$\therefore$ $AC=AO+CO$

$\Rightarrow$ $AC=5+5$

$\therefore$ $AC=10cm$