Oblicz w pamięci obwody:
prostokąt:2 dm,2dm,12dm,12dm
romb:3m,3m,3m,3m
trapez prostokątny:4dm,4dm,7dm,5dm
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2. Obw = 4 * 3m = 12m
3. Obw = 2 * 4dm + 7dm + 5dm = 8dm +12dm = 20dm
NAPEWNO TO JEST DOBRZE :D
romb: 12 m
trapez prostokątny: 20 dm