Diagonals 5551

The cube has a wall area of 81 cm2. Calculate the length of its edge, wall, and solid diagonals.

Correct answer:

a =  9 cm
u1 =  12.7279 cm
u2 =  15.5885 cm

Step-by-step explanation:

S=81 cm2  S = a2 a=S=81=9 cm
u1=2 a=2 9=9 2=12.7279 cm
u2=3 a=3 9=9 3=15.5885 cm



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