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P=6*5/2
P=15
b)P=a*h/2
P=3*7/2
P=10,5
Na 100% dobrze.
wiec 5*6/2= 15
b) h= 7 podstawa = 3 po obroceniu trojkata o 90 stopni w lewo ;)
wiec 7*3/2= 10.5
pozdrawiam