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**dgenerationx2** 5. A circle is sketched on a coordinate plane with the center at (6, 8). The circle passes through the point (0, 5). Which of these expressions could be used to find r. the radius of the circle

Use the distance formula to find the distance from the center (6, 8) to (0, 5) on the circle.

$\displaystyle r^2=(x_2-x_1)^2+(y_2-y_1)^2$

$\displaystyle (0-6)^2+(5-8)^2=r^2$

Answer **A** is equivalent to what I have written

all answers to this question are squared

A. (6 - 0)^2 + (8 - 5)^2

B. (6 + 8)^2 + (0 + 5)^2

C. (6 - 8)^2 + (0 - 5)^2

D. (6 + 0)^2 + (8 + 5)^2