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2010-02-04T20:05:17+01:00
A) 4 cm
V = a³√2/12 = 4³√2/12 = 64√2/12 = 16√2/3
Pc = a²√3 = 4²√3 = 16√3

b) 2√2 cm
V= a³√2/12 = (2√2)³*√2/12 = 8*2√2*√2/12 = 8*4/12 = 24/12 = 2
Pc = a²√3 = (2√2)²*√3 = 8√3

c) 4√6 cm
V = a³√2/12 = (4√6)³*√2/12 = 64*6√6*√2/12 = 64*6*√12/12 = 384√12/12 = 32√12
Pc = a²√3 = (4√6)²√3 = 96√3