Question

a rectangle ABCD in which AB is equal to 12 cm and BC is equal to 5 cm.Write down the length of AC

Answer 1

$\huge \pink{bonjour}$

We have to find the length of diagonal AC(refer the enclosed figure)

We know that all the angles of a rectangle are right angles.

Now, using Pythagoras theorem in ∆ABC,

AC²=AB²+BC²

AC²=(12)²+(5)²

AC²=144+25

AC²=169

AC=13 cm