Question

find the value of 1(AC) =? ​

Answer 1

Step-by-step explanation:

Given. In triangle ABC angle B is 90°.

l(AB)=2cm,l(BC)=4cm.

To find. l(AC)=?

Solution. By pithagoras theorem...

(AB)^2+(BC)^2=(AC)^2

Therefore 2^2+4^2=(AC)^2

4+16=AC^2

20=AC^2

AC=√20

AC=√2×2×5

AC=2√5cm

Ans= Length of side AC will be 2√5cm