[" 1.In a "/_ABC,D,E" and "F" are,respectively,the mid-points of "BC,CA" and "AB" .If the lengthso "],[" side "AB,BC" and "CA" are "7cm,8cm" and "9cm" ,respectively,find the perimeter of "Delta DEF" ."]

In a DeltaABC,D,E and F are respectively the mid-points of BC, CA and AB. If the lengths of side AB, BC and CA are 7 cm, 8 cm and 9 cm respectively, find the permeter of DeltaDEF.

In a DeltaABC,D,E and F are respectively the mid-points of BC, CA and AB. If the lengths of side AB, BC and CA are 7 cm, 8 cm and 9 cm respectively, find the permeter of DeltaDEF.

In a Δ ABC, D,E,F are respectively, the mid- points of BC,CA, and AB. If the lengths of side AB, BC and CA are 7 cm, 8 cm, 9 cm, respectively, find the perimeter of Δ DEF.

In a DeltaABC , D, E and F are the midpoints of BC, CA and AB respectively. If the lengths of side AB, BC and CA are 7 cm, 8 cm and 9 cm respectively, the perimeter of DeltaDEF is a cm. The value of a/2 is

D,E and F are respectively the mid-points of the sides BC,CA and AB of a /_ABC. Show that (i) BDEF is a parallelogram

D, E and F are respectively the mid-points of the sides BC, CA and AB of a triangle ABC . Show that:- BDEF is a parallelogram.

In the given figure, a circle is inscribed in a DeltaABC such that it touches the sides AB, BC, and CA at points D, E, and F respectively. If the lengths of the sides AB, BC, and CA are 12 cm, 8 cm, and 10 cm respectively, find the lengths of AD, BE, and CF.