Question

In a triangle ABC ,D, E and F are mid points of AB, BC and AC. If AC = 7 cm BC = 8 cm AC = 9 cm Find the perimeter of DEF


Please Find the Perimeter and tell​

Answer 1

Answer:

Answer-

Side of square = 18cm

Area of square path = 18cm×18cm = 324cm²

Side of tile = 3cm

Area of one tile = 3cm × 3cm = 9cm²

number of tiles can be laid =

= \frac{area \: of \: path}{area \: of \: tile}=

areaoftile

areaofpath

= 324 cm / 9cm

= 36

36 tiles can be laid

Answer 2

Answer:

Answer:

the perimeter of ΔDEF is 12 cm.

Step-by-step explanation:

By using Midpoint Theorem, we get

Perimeter of ΔDEF = DE + EF + DF

                               =1/2AB+1/2BC+1/2AC

                               =1/2(7+8+9)

                               =24/2

                                =12cm