P=1/2a*h
18=4,5*h
18 /4,5 = 4
1/2* 9*4=18
Odp. 4 cm
P=0,5*a*b18=0,5*9*b2=0,5*bb=4Odp.: Druga przyprostokątna ma 4 cm
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P=1/2a*h
18=4,5*h
18 /4,5 = 4
1/2* 9*4=18
Odp. 4 cm
P=0,5*a*b
18=0,5*9*b
2=0,5*b
b=4
Odp.: Druga przyprostokątna ma 4 cm