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b-drugi bok
c-przkątna
a-15cm
b-15√3cm
c-30cm
30cm+15+15√3= 45cm+15√3 = 15(3+√3)
15(3+√3) * 8 = (45+15√3)*8= 360cm+120√3=120(3+√3)
15*4=60cm
60cm*2=120cm
120cm+120(3+√3)cm= 120cm+360cm+120√3cm= 480cm+120√3cm= 120(4+√3) cm
1dm³-1000cm
1dm³- 1 litr