Diamond

Side length of diamond is 35 cm and the length of the diagonal is 56 cm. Calculate the height and length of the second diagonal.

Correct result:

v =  16.8 cm
u =  42 cm

Solution:

S1=S2 12av=12u1u2 1235v=1256u 35v=56u a2=(u1/2)2+(u2/2)2 352=(56/2)2+(u/2)2 v=14⋅56⋅u/(35)=16.8 cm 
u=4⋅ 352−562=42 cm

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