Math Help - Different Conics

Write the standard form of the equation of the circle with the given center C that passes through the given point Z.

C(2,4); Z(6,4)

C(4,-2); Z(2,7)

C(0,0; Z(-6,0)

use the distance formula to find the distance between C and Z, this will be the circle's radius.

use what you've learned from the lesson link in your other post to write the circle equation in standard form.