To find the scale factor of two triangles, look first for one pair of corresponding sides--one side from the smaller triangle and the corresponding side from the larger triangle. Divide the larger side length by the smaller side length, and that quotient is your scale factor.
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You need numbers from the sides of the triangles. Take numbers from the corresponding (matching) sides, one number from the small triangle, and one number from the big triangle. Then divide the big number by the small number. The answer is the scale factor. Put another way, the scale factor is the number that multiplies the small triangle to create the large triangle.
If two triangles are similar, then the reduced ratio of any two corresponding sides is called the scale factor of the similar triangles
how do you find the scale factor of two circles
how to do a scale factor of cylinder is that you find the base and the height and the length of A area hope you like my examples.
The two scale factors are reciprocals of one another.