All Common Core: High School - Geometry Resources
Example Questions
Example Question #11 : Derive Circle Equation: Ccss.Math.Content.Hsg Gpe.A.1
What is the equation of the circle shown below?
In order to find the equation, we must find the coordinates of the center of the circle.
If we look at the picture,
we can see that the center is at
The next step it to find the radius. From looking at the picture, we can see that the radius is 6. With this information, we can plug it into the general circle equation.
The general circle equation is
Now we substitute for ,
, and
We plug in the values, we get
Example Question #12 : Derive Circle Equation: Ccss.Math.Content.Hsg Gpe.A.1
What is the equation of the circle shown below?
In order to find the equation, we must find the coordinates of the center of the circle.
If we look at the picture,
we can see that the center is at .
The next step it to find the radius. From looking at the picture, we can see that the radius is 2.
With this information, we can plug it into the general circle equation.
The general circle equation is
Now we substitute for ,
, and
We plug in the values, we get
All Common Core: High School - Geometry Resources
