The diameter of a circle with endpoints a(-1,5) and b(4,-3) use the midpoint formula to find the coordinates of the center of circle p(xy)

Since all 4 radii are shown to have the same length value of √10, we are confident that our calculations for center C and diameter endpoint E are correct.

Finally, we can also calculate the length of the diameter since it is simply twice the length of the radius:

   radius = √10

   diameter = 2√10

Step-by-step explanation:

option a is correct.

step-by-step explanation:

scale factor: it is used to find proportional measurements.

proportions means having the same ratio.

scale factor is the ratio of the model measurement to the actual measurement in a simplest form.

or we can say that the ratio of any two corresponding lengths in two similar geometric figures

if the scale factor is more than 1, then it is an enlargement,

if the scale factor less than 1, then it is a reduction.

given the two geometric figure:

by definition of proportions, we have