Question

[phuong]

do dai cac canh cua tam giac ti le theo 2:3:4.Hoi cac canh tuong ung cua tam giac ti le voi nhau theo ti so nao

Answer 1

[thien ty tfboys]

Goi a,b,c la do dai cac canh cua tam giac ti le theo 2;3;4

a/2=b/3=c/4 va a+b+c=180

Ap dung tinh chat day ti so bang nhau ta co : 

a/2=b/3=c/4=a+b+c/2+3+4=180/9=20

Suy ra :a/2=20=>a=2.20=40

b/3=20=>b=3.20=60

c/4=40=>c=4.40=160

lik e he