Geometry 11.5 Circle Eqns

Geometry 11.5

Equations of Circles​

Geometry meets Algebra in the coordinate plane​

Fill in the Blanks

What is the radius of the circle?

$\left(x-3\right)^2+\left(y+2\right)^2=25$  

Multiple Choice

What is the coordinate of the center of the circle? $$\left(x-3\right)^2+\left(y+2\right)^2=25$$  

• (-3, 2)

• (2, -3)

• (3, -2)

• (-2, 3)

Fill in the Blanks

What is the radius of the circle?

$x^2+\left(y-4\right)^2=9$  

Multiple Choice

What is the coordinate of the center of the circle?

$$x^2+\left(y-4\right)^2=9$$  

• (3, 2)

• (0, -4)

• (3, 4)

• (0, 4)

Draw

Write the equation of a circle with a center of (-2, 0) and a radius of 1.

Draw

Write the equation of a circle with a center of (5, -2) and a radius of 16.

Draw

Graph the circle: $$x^2+\left(y-2\right)^2=4$$  

Draw

Graph the circle: $$\left(x-2\right)^2+\left(y+1\right)^2=9$$  

Draw

Draw a circle

with a center of (1, -3) and that goes through the point (-2, 1).

Then write the equation.

Go Formative Section 11.5

Please make sure you have all the formatives complete by Friday.

​Homework