Oblicz pole rombu o obwodzie 60cm i przekątnej 10cm.
Obw=60cm
Obw=4a
4a=60cm/:4
a=15cm
a=p=10cm
0,5a=0,5*10cm=5cm
a²+b²=c²
5²+b²=15²
25+b²=225
b=√200
b=√100*2
b=q=10√2
P=p*q/2
P=10cm*10√2cm/2
P=100√2cm²/2
P=50√2cm²
licze na naj ;d
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Obw=60cm
Obw=4a
4a=60cm/:4
a=15cm
a=p=10cm
0,5a=0,5*10cm=5cm
a²+b²=c²
5²+b²=15²
25+b²=225
b=√200
b=√100*2
b=q=10√2
P=p*q/2
P=10cm*10√2cm/2
P=100√2cm²/2
P=50√2cm²
licze na naj ;d