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3,5cm *3= 10,5cm
3x - drugi bok
2*x + 2*3x = 28
2x + 6 x = 28
8x = 28 / : 8
x = 3,5 - jeden bok
3x = 3* 3,5= 10,5- drugi bok
Takie zadania pisz do mnie na priv to ci je za darmo rozwiąże bez żadnych punktów ;)
abwod = 2a+2b
28=2a+2b/2
14=a+b
14=a+3a
14=4a/4
a=3,5 wiec b = 10,5