Question

A square ABCD is of 15cm each. Find the diagonal AC .

Answer 1

Answer:

21.21

Step-by-step explanation:

by using phythagorous therom

ab (square) +bc (square)=ac (square)

225 +225 =ac (square)

450=√ac

ac = 21.21

Answer 2

Given:

ABCD is a square

AB= BC=CD=AD=15cm

To find: AC

sol:

In ∆ABC

using Pythagoras theorem

AC²=AB²+BC²

AC²=(15)²+(15)²

=225+225

=450

AC=15✓2cm