4) Points E and F are mid points of seg AB and seg AC of D ABC respectively. If EF = 5.6 then find the length of BC.
Answers
Answered by
1
Answer:
Given that
AB = 7cm, BC = 8cm, AC = 9cm .
In ΔABC
∴ F and E are the midpoint of AB and AC
∴EF =
12 BC [Mid-points theorem]
Similarly
DF =
12 AC, DE =
12 AB
Perimeter of ΔDEF = DE + EF + DF
=
12 AB +
12 BC
12AC
=
12× 7 +
12 × 8 +
12× 9
= 3.5 + 4 + 4.5 = 12cm
∴ Perimeter of ΔDEF = 12cm
Similar questions