D, E and F are the mid point of the sides BC, CA and respectively of A .ABc if AB=7cm , BC=8cm and CA = 9cm find the perimeter of the DEF
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Use Mid-Point theorum and find sides of triangle DEF and Add them
DE=1/2AC
DF=1/2BC
EF=1/2AB
Add all three equations we get
DE+DF+EF=1/2×(AB+BC+AC)
=1/2×(7+8+9)
=12
DE=1/2AC
DF=1/2BC
EF=1/2AB
Add all three equations we get
DE+DF+EF=1/2×(AB+BC+AC)
=1/2×(7+8+9)
=12
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