Body diagonal

Cuboid with base 7cm x 3,9cm and body diagonal 9cm long. Find the height of the cuboid and the length of the diagonal of the base,

Correct result:

u1 =  8.0131 cm
h =  4.0976 cm

Solution:

a=7 cm b=3.9 cm u=9 cm u1=a2+b2=72+3.92=8.0131 cm
h=u2−u12=92−8.01312=4.0976 cm

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