Question

Question - What is the length of side EF ?​

Answer 1

Answer:

5cm

Step-by-step explanation:

applying Pythagoras theorem in right angled triangle EFD

(FE)^2= FD^2+ED^2

FE^2= 4^2+3^2

FE^2= 16+9

FE^2= 25

FE=5

Answer 2

Given:

Right angled ∆EDF right angle at D

ED = 3cm

FD = 4cm

To Find:

Length of EF

Solution:

In ∆EDF [By Pythagoras theorem]

(EF)² = (ED)² + (FD)²

(EF)² = (3)² + (4)²

(EF)² = 9 + 16

(EF)² = 25

EF = √25

EF = 5cm

Hence, the length of side EF is 5cm