Question

5. In a AABC, D, E and F are the mid points of BC, CA and AB respectively. If the lengths of side AB, BC and CA are 7cm , 8cm and 9cm then find the lengths of DE and EF.​

Answer 1

Answer:

In a ΔABC, D, E and F are the mid points of BC, CA and AB respectively. then DE and EF are 3.5 cm and 4 cm respectively.

Step-by-step explanation:

AB= 7cm

BC =  8cm  

and CA = 9cm  

find the lengths of DE and EF.​

Now, using Midpoint Theorem, we get

$EF = \frac{1}{2} BC$

$=\frac{1}{2} \times 8$

$= 4 cm$

$DE = \frac{1}{2} AB$

$=\frac{1}{2} \times 7$

$= 3.5 cm$