Question

O prisma patrulatera regulara are aria laterala 48 cm patrati si aria totala 80 cm patrati.
O lautura a unei baze a prismei are lungimea de .... cm?
Ma puteti ajuta pls?

Answer 1

Al+2Ab=At
48+2l*l=80
2l*l=32
l*l=16
l=4

Answer 2

A lat = 48 cm²
A tot = 80 cm²
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l = ?
A tot = A lat + 2 x Abazei = A lat + 2 x l²
80 = 48 + 2l²
2l² = 32
l² = 16
l = 4 cm