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a = 6cm
h = 8cm
Pp = 6cm*8cm/2
Pp = 24cm²
z tw Pitagorasa obliczamy długość trzeciej krawędzi podstawy
6² + 8² = c²
36 + 64 = c²
100 = c² /√
10cm = c
Pb = 3cm*8cm + 3cm*6cm + 3cm*10cm
Pb = 24cm² + 18cm² + 30cm²
Pb = 72cm²
Pc = 2*24cm² + 72cm²
Pc = 120cm²