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P1+P2=90cm2
(P1 ma ta 1 czastke)
P1=90cm2:4=22,5cm2 -pole pierwszej figury
(P2 ma 3 takie czastki)
P2=22,5cm2*3=67,5cm2-pole drogiej figury
Spr. 22,5+67,5=90[cm2]
Pola tych figur to 22,5cm2 i 67,5cm2 ;))