Circle Equations and Graphs Worksheets
You already know what a circle is. It is a shape easy to make and the distance between the center of a circle and its edges at all points is the same. Based on this idea the circle equation is formed. A circle equation is: x^{2} + y^{2} = radius^{2} The radius of a circle is always the same and if it isnâ€™t, then it is not a circle. When you draw a circle on a graph paper, you first assume a point which is at a particular distance from the center. Let's consider the points are (0, 5). Hence, the value of the radius according to x^{2} + y^{2} = radius^{2} will be 0 + 25 = 25. Based on these values we can make other prediction regarding what values will make the square of radius equal to 25.

Basic Lesson
Guides students through matching equation of a circle and graphs. As standard form equation of circle is:(xh)^{2} +(yk)^{2} = r^{2}. Given the equation can be written as: (x  0)^{2} + (y0)^{2} = (2)^{2} here h=0,k=0 & r=2, and standard equation is x^{2} +y^{2} = (2)^{2}.
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Intermediate Lesson
Demonstrates how to match equations of circles and visual graphs.
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Independent Practice 1
A really great activity for allowing students to understand the concepts of the Circle Equations and Graphs. Match the standard equations and graphs.
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Independent Practice 2
Students use Circle Equations and Graphs in 20 assorted problems. The answers can be found below.
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Homework Worksheet
Students are provided with 12 problems to achieve the concepts of Circle Equations and Graphs.
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Skill Quiz
This tests the students ability to understand Circle Equations and Graphs.
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Someone who certainly knows all of the angles!