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Pp=30cm²
V= Pp x H
V= 30cm² x 12cm = 360cm³
c-krawędź rombu
5²+3² = c₂
25 + 9 = c²
36 = c²
c= 6 cm
Pb= 12cm x 6 cm = 72cm²
Pc= 2Pp + Pb
Pc= 2 x 30cm² + 72cm² = 132 cm²
suma długości wszystkich krawędzi
4x6 + 4x6 + 4x 12 = 24 + 24 + 48 = 96cm
;)