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pp Δ = a*h/2
pp Δ ruwnobocznego =a²*√2 /4
a)
pp=8²*√2/4
pp= 64√2 /4
pp=16√2
v=pp*h
v=16√2 *10
v=160√2 cm3
b)
pp= 12*13 /2
pp=156 /2
pp =78
v= pp*h
v=78*10
V =780 cm3