1. Let A ABC - A DEF and their areas be, respectively, 64 cm' and 121 cm. If EF =
15.4 cm, find BC.
Answers
Answered by
0
Answer:
21.3 cm
Step-by-step explanation:
use the formula of chapter 6 triangles
last formula
class 10 ncert
Answered by
3
Answer:
△ABC∼△DEF
⟹
Ar(ΔDEF)
Ar(ΔABC)
=(
EF
BC
)
2
121
64
=(
15.4
BC
)
2
BC=
121
64
×15.4
BC=
11
8
×15.4=11.2cm
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