Mathematics

Problem

In parallelogram

ABCD

, the diagonals intersect at

O

. If

AO = 7.2\text{ cm}

and

BO = 5.4\text{ cm}

, what is the length of

AC

? a)

12.6\text{ cm}

9\text{ cm}

14.4\text{ cm}

10.8\text{ cm}