Question

The segment below is dilated by a scale factor of 4 to form start overline, O, prime, P, prime, end overline. What is the measure of start overline, O, prime, P, prime, end overline?

On the line the number 10 is n the middle with 0 on the left and p on the right

Answer 1

If 10 is the midpoint of 0 and p, then p = 20. So the original segment OP has length 20. A dilation by factor 4 multiplies lengths by 4, so O'P' = 4·20 = 80.