Thread: Dilation

Given a dilation with the origin O (0, 0), by observation determine the scale factor "K."

Hello winsome

Originally Posted by winsome

Given a dilation with the origin O (0, 0), by observation determine the scale factor "K."

Take a point on the original shape. Join it to the origin . Take the image of this point on the new shape; join to . The scale factor of the dilation is given by

Grandad

Given a dilation with the origin O (0, 0), by observation determine the scale factor "K."
DO, K = (5, 0) (10, 0)
The dilation an expansion.

Try visualize it, you got two lines on the x-axis. One goes from 0 to 5, we call that l, and the other goes from 0 to 10 which we call m. How much 'longer' is m compared to l?