Rectangular Parallelepiped Length and Angle Problem Help:(!!

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ticaaal70
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Rectangular Parallelepiped Length and Angle Problem Help:(!!

Postby ticaaal70 » Mon Jul 01, 2013 9:16 pm

A rectanglar parallelepiped with square ends has 12 edges and six surfaces. If the sum of all edges is 176 cm and the total surface area is 1288 cm^(2)

Find:

A) the length of the diagonal of the parallelpiped (shown as bold line in figure)

B) the angle the diagonal makes with the base (two answers are possible)

Picture of figure is linked below

Image

Thank You:)

theshadow
Posts: 102
Joined: Sun Feb 22, 2009 11:12 pm

Re: Rectangular Parallelepiped Length and Angle Problem Help

Postby theshadow » Tue Jul 02, 2013 12:45 am

ticaaal70 wrote:A rectanglar parallelepiped with square ends has 12 edges and six surfaces. If the sum of all edges is 176 cm and the total surface area is 1288 cm^(2). Find:

A) the length of the diagonal of the parallelpiped (shown as bold line in figure)
B) the angle the diagonal makes with the base (two answers are possible)

This shape is sometimes called a brick. If the square edges are S and the other edges are T then they gave you 8S+4T=176 and S^2*T=1288. Where did you get stuck solving this?


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