Which tabs are expandable and collapsible in word 2010?
□ quick access toolbar
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□ view
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□ references
□ status bar
□ review

If I'm not mistaken its view it was in the top left corner and had things like edit and such when expanded

Hypothesis: volumes of both figures are equal.the volume of  figure 1 is: .the volume of figure 2 is: .since , you can conclude that and . so, .volumes of figures are equal only when an angle in the basis is right (then figures will be the same), in another cases volume of figure 1 is less than volume of figure 2.the hypothesis was not correct in all cases.