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Im assuming the base of the triangle is 4cm. The volume is 
.
If the dimensions are tripled, the base is 12, the height is 24, and the length is 18. The volume is
, which is 27 times bigger.
If you are increasing each side by a factor of x, you are multiplying the original by
If the dimensions are tripled, the base is 12, the height is 24, and the length is 18. The volume is
If you are increasing each side by a factor of x, you are multiplying the original by
Remember that the degree measure of each exterior angle of a polygon can be found through the formula
where is the number of sides on the polygon.
Since a pentagon has five sides, the degree measures of each of its five sides would be:
Thus, our answer is Choice B, or 72 degrees.