LESSON Reading Strategies 12-7 Use a Concept Map Use the concept map below to help you understand circles in the coordinate plane Equation The equation of a circle with center (h, k) and radius r is ( x - h)2 + (y-k)2 = 12. Circles in the Coordinate Plane Example Graph The equation of a circle with center (2, -3) and radius 4: -2 o (x - 2)2 + (y- (-3))2=42 -2 or (2, -3 ) (x - 2)2 + (y+ 3)2= 16 Write the equation of each circle. 1. a circle with center (-2, 10) and radius 6 2. a circle with center (0, 0) and radius 3 3. a circle with center (8, 2) and radius V7 Graph each circle. 4. (x + 1)2 + (y- 5)2=25 5. ( x - 4)2 + (y - 2)2 = 9 0