Placinte4ask
a fost răspuns

DAU 50 PUNCTE SI COROANA!
Aflati inaltimile triunghiului cu laturile de 13 cm,20 cm,21 cm.

Răspuns :

Lucaselaask

p=(13+20+21)/2=54/2=27

A=√[27(27-13)(27-20)(27-21)]= √(27•14•7•6)=2•9•7=126cm²

A=126cm²

A=13•h1/2=20•h2/2=21•h3/2

h1=2A/13=2•126/13=252/13 cm²

h2=2A/20=2•126/20=63/5 cm²

h3=2A/21=2•126/21=12 cm²

Ask Alte intrebari