Răspuns :
Se aplica teorema luipitagora ip²=30²+40² ip²=√900+1600 ip=√2500=50 A=c×c/2=30×40/2=600cm² P=30+40+50=120cm
[tex]A= \frac{30*40}{2} = 600 cm^{2} [/tex]
[tex]P= AB+BC+AC[/tex]
[tex] BC^{2} = 40^{2} + 30^{2} = 1600+900= 2500[/tex]
[tex] BC=\sqrt{2500} = 50cm [/tex]
[tex]P= 40+30+50= 120cm[/tex]