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McGraw Hill Glencoe Geometry, 2012

MH

McGraw Hill Glencoe Geometry, 2012 View details

8. Equations of Circles

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Exercise 1 Page 760

Let's start by recalling the standard form of an 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

(9, 0)

and its radius is

5 .

This information is enough to write the equation.

(x - 9)^{2} + (y - 0)^{2} = 5^{2} ⇕ (x - 9)^{2} + y^{2} = 25

Subchapter links

Check Your Understanding p.760

Practice and Problem Solving p.760-762

H.O.T. Problems p.762

Standardized Test Practice p.763

Spiral Review p.763

Skills Review p.763