Need help with Geometry, 10th grade, I don't get it, Help needed. Explain to me, Im trying to learn it also. http://tinypic.com/r/2pophr9/6

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Which part specifically are you stuck on?

Basically, I don't get how to find the longest side (bookshelf) and the largest angle (computer), with only ONE thing (7 ft.)

Okay. So in the picture, that tiny square in the corner tells you that this triangle is a "right" triangle. Right triangles mean that one of the angles is 90 degrees and this is what that little square is telling you. Next, the rule of triangle angles as that when you add up the 3 angles, it should equal 180 degrees. So with this right triangle, you already know that that corner with the box is the "right" angle at 90 degrees. That means that the other two angles must add up to 90 degrees as well (180 degrees minus 90 degrees). Following so far?

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