Oblicz pole rownoległoboku o obwodzie 36 i wysokościach 3 i 5
2a+2b=36 =>a=18-b
5a=3b
5(18-b)=3b
90-5b=3b
90=8b |:8
b=11,25cm
a=18-b=6,75 cm
P=a*H1=6,75*5=33,75 cm2
lub
P=b*H2=11,25*3=33,75 cm2
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2a+2b=36 =>a=18-b
5a=3b
5(18-b)=3b
90-5b=3b
90=8b |:8
b=11,25cm
a=18-b=6,75 cm
P=a*H1=6,75*5=33,75 cm2
lub
P=b*H2=11,25*3=33,75 cm2