Why do you suppose that girders are so often arranged to
Chapter , Problem 84TAD(choose chapter or problem)
Why do you suppose that girders are so often arranged to form triangles in the construction of bridges and other structures? (Compare the stability of three sticks nailed together to form a triangle with four sticks nailed together to form a rectangle, or any number of sticks to form multilegged geometrical figures. Try it and see!)
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