Question

a area total da piramide triangular regular, com todas as arestas iguais a 5cm, vale, em cm2
a)5V3
b)10V3
c)15V3
d)20V3
e)25V3​

Answer 1

At = 4.(a².√3/4)

At = a².√3

At = 5².√3

At = 25√3