body{margin:0;} noscript{z-index: 10000; position: fixed; display: block; height: 100%; width: 100%; background: #fff;} noscript .fa{font-size: 40px; display:block; color: #daa520;} noscript div{margin-top: 6%; padding-left: 20px; padding-right: 20px; text-align: center;} ! You must have JavaScript enabled to use this site.

Big Ideas Math Geometry, 2014

BI

Big Ideas Math Geometry, 2014 View details

7. Circles in the Coordinate Plane

Continue to next subchapter

Exercise 2 Page 576

What is the standard equation of a circle?

(x+2)^2+(y-5)^2=49

Practice makes perfect

Let's start by recalling the standard equation of a circle.

(x- h)^2+(y- k)^2= r^2 In this form, ( h, k) is the center of the circle and r is its radius. We are told that the center of the circle is ( - 2, 5) and its radius is 7. This information is enough to write the equation. (x-( - 2))^2+(y- 5)^2= 7^2 ⇕ (x+2)^2+(y-5)^2=49

Subchapter links

Communicate Your Answer p.575

Monitoring Progress p.576-578

Exercises p.579-580