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21 February, 20:07

A triangular prism has a height of 10 cm and a base area of 12 cm2. A rectangular prism has a height of 10 cm and base dimensions of 3 cm and 4 cm. Do the solids have the same volume?. A ... Yes, because they have the same height and the same cross sectional area at every level parallel to the bases ... B ... Yes, because they are congruent solids ... C ... No, because Cavalieri's principle only applies to solids with congruent cross sections ... D ... No, because they have different dimensions ...

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  1. 21 February, 20:27
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    V triangular prism = (10 x12) / 3 = 120 / 3 = 40 cm^3;

    The base area of rectangle is 3 x 4 = 12 cm^2;

    V rectangular prism = (10x12) / 3 = 40 cm^3;

    The solids have the same volume!

    Two solids are congruent if all their angles, edges, and faces are congruent.

    Finally, the right answer is A.
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