If a scale factor of 1/5 is used to make a reduction, what is the base of the original triangle? reduced triangle height 3 base 5 ..original triangle 0 base 0A.1B.10C.15D.25

If the scale factor is 1/5, that means the original triangle would have dimensions 5 times larger than the current model. So if the current base is 5 units in size, the original triangle would be 5 times larger. 5 x 5 = 25 Units The answer is D.