Question

triangle ABC - triangle DEF and the perimeters of AABC and
ADEF are 30 cm and 18 cm respectively.
If BC = 9 cm, then EF is equal to :​

Answer 1

Answer:

Perimeter of triangle ABCD= 30 cm.

And Triangle ADEF= 18 cm.

If, BC= 9cm.

Sum of triangle=360°

@+@+@=360°

3@=360

@=120°

Triangle ABC=triangle FED

By A.I.A

AB=EF=120°