Question

Let triangle ABC ~triangle DEF&their areas be, respectively, 64cmsquare & 121cm square. If EF=15.4cm, find BC

Answer 1

Hope this answer helps you

Answer 2

we know that if two triangles are similar then
ar(ABC)/ar(DEF)=
$bc ^{2} \div ef ^{2}$
》64/121=(bc)sq/(15.4)sq
8/11=bc/15.4
bc=(15.4×8)/11=1.4×8=11.2cm

Hope it helps!