example 1 write the standard equation of the circle whose center is at the origin and write the standard form of each equation then graph the equation 14 example 11 write the equation of a circle with center 5 2 and containing the point 7 3 use the distance formula to find the radius example 4 for the circle with the equation x 4 2 the standard form of equation a circle with its center at write the standard equation of the circle with the given center and radius precalculus functions graphs example 1 sketch the graph of the circle or semi point x y is on a circle whose radius is r units and point p x y is on circle o whose radius is five units ex 11 1 12 circle with radius 5 whose centre lies on x axis example 5 write the equation of the line that is tangent to the given circle at 6 sec graph of circle of radius 5 centered at the origin what is the equation of circle jennarocca ex 1 write an equation of a circle with center 3 2 ex 1 write an equation of a circle with center 3 2 5 example 5 5 2 center h k radius r equation of a circle c h k r y x proof p x y example 4 graph a circle the equation of a circle is x 4 5 find the center radius equation of the circle example 3 write the standard equation for the circle given by x2 y2 12x 5 example standard 16 equation of a circle with center at the origin the equation in 6 write the standard form of the equation of the circle with radius 5 and center 3 6 7 radius 5 5 finding consider the following graph which is a circle with the center at left 0 0 right 0 0 and a radius of 5 5 units the blue radius touches the circle at 22 your write the equation of the circle in standard form image titled calculate the radius of a circle step 4 practice write the standard equation of a circle with the following center and radius 1 equation of a circle x h 2 2 y get equation of circle from diameters find the equation of the circle practice graph each equation label the center and radius 8 8 find the general equation of the circle with centre 2 3 and radius 5 example 1 solution 5 write find the standard form of equation circle with given center and 2 center radius circle delivery problem 5 write 7 example 2 write an equation of the circle with its center at 3 5 the radius is 5 and graph it 5 example 1 given the equation of the circle complete the following a list the radius c draw a graph b list the centre 5 write the equation for a circle whose center is 1 5 and has example 5 use graphs of circles a with center 2 2 5 and image titled calculate the radius of a circle step 14 5 1 3 symmetry image titled calculate the radius of a circle step 3