# Equation of a Circle - Page 33

Questions

- Tangents and Circles, PLEASE help?
- Given x2 + (y - 2)2 = 9 is an equation of a circle. What are the coordinates of the center?
- The center of a circle is (-3,0) and its radius is 5. Which two points do not lie on the circle?
- -the equation x^2 + y^2 -4x+2y=b how do you determine the y coordinate of the center of the circle. Also, if the radius of the circle is 7 units, what is the value of b in the equation?
- What is a equation that has a center at (-5,2) with a radius of 6?
- The diameter of a circle is 35cm.find its cirumference?
- Find the center and radius of x^2+y^2+6y-8x=0?
- How do you write the equation of the circle centered at ( − 3 , 4 ) that passes through ( 9 , 13 )?
- A circular light fixture has a radius of 20 centimeters. What is the circumference of the light fixture?
- Find the equation of the circle which passes through the origin and the point of intersection of the circles x^2+y^2-4x-8y+16=0 and x^2+y^2+6x-4y-3=0?
- A circle has a circumference of 9 π 9π9, pi. What is the diameter of the circle?
- Which is the equation of a circle with center (-5, 2) and radius sqrt 7}?
- How do you write the equation of a circle for center:(5,-13) radius:11?
- Find the equation of the circle with A(2,-3)and B(-3,5)as endpoints of a diameter?
- I need help with these asap please thank you i don't understand?
- If two circles #x^2+y^2+2ax+c^2=0# and #x^2+y^2+2by+c^2=0# touch each other externally then prove that #1/(a^2)+1/(b^2)=1/(c^4)# ?
- The point (5,2) is on the circle whose center is (3,2) ?
- Equation of circle passing through (-1,-2) and concentric with the circle x^2 +y^2 +3x + 4y +1 =0 ?
- Find the equation of the tangent to the circle x²+y²-2y-23=0 at the point p(5,-2)?