The number used to multiply the lengths of a figure to stretch or shrink it to a similar image. If we use a scale factor of 3, all lengths in the image are 3 times as long as the corresponding...
Let's get at the idea by working backward. Suppose we know the scale factor; what will the ratio of perimeters be? For instance, suppose we have two triangles; one has sides of 3, 4, and 5 inches;...
A factor of a number is a number that number can divide by. For instance, 20 has the factors 1, 2, 4, 5, 10 and 20. 28 has the factors 1, 2, 4, 7, 14 and 28. Common factors are factors which appear...