Question

11. In ∆ABC, D, E and F are the midpoints of sides AB, BC and CA. If AB is 6 cm, BC is 7.2 cm and AC is 7.8 cm, find the

perimeter of ∆DEF.​

Answer 1

Answer:

Perimeter of triangle. DEF=10.5 cm

Step-by-step explanation:

According to midpoint theorem

DE=BC/2

EF=AB/2

DF=AC/2

SO, Perimeter of triangle DEF=AB+BC+AC/2

=(6+7.2+7.8)/2

=21/2=10.5 cm