Răspunsuri

2014-04-27T23:19:53+03:00
A/2=b/3=c/5=k
a=2k;b=3k;c=5k
12k=180⇒k=180/12=15
a=15·2=30³
b=15·3=45³
c=5·15=75³ ⇒ nu este dreptunghic.
2014-04-28T00:04:06+03:00
A,b,c  dp cu 2,3,5
a/2= b/3 =c/5=k
a=2k
b=3k
c=5k
2k+3k+5k=180
10k=180
k=18
a=2*18=36
b=3*18=54
c=5*18=90⇒  ΔACB-dreptunghic mas<C=90 grade