trójkąt
h=8
p=120cm
ile wynosi a
p = 1/2 a*h / : 1/2*ha= p: 1/2*ha=120 : 1/2*8a=30cm
P=120
120=a*8/2
120=a*4
120/4=30
a=30
P30*8/2=120
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p = 1/2 a*h / : 1/2*h
a= p: 1/2*h
a=120 : 1/2*8
a=30cm
P=120
h=8
120=a*8/2
120=a*4
120/4=30
a=30
P30*8/2=120