P=28cm2
P=1/2*a*h
28=1/2a*8
28=8/2a /:82
a=18*2/8
a=56/8
a=7
sprawdzenie:
p=1/2*a*h
P=1/2*8*7
P=82*7
P=4*7
:)
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P=28cm2
P=1/2*a*h
28=1/2a*8
28=8/2a /:82
a=18*2/8
a=56/8
a=7
sprawdzenie:
p=1/2*a*h
P=1/2*8*7
P=82*7
P=4*7
P=28cm2
:)