10-3 Circles Learning Target: I can use equations of circles to model and solve problems Goal 2.09.

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Presentation transcript:

10-3 Circles Learning Target: I can use equations of circles to model and solve problems Goal 2.09

A circle needs two things 1. radius 2. center radius center

The standard form of a circle with center (h,k) and radius r is(x-h) 2 +(y-k) 2 =r 2 Ex. Write an equation of a circle with center (-4, 3) and radius 4. Try. Write an equation of a circle with center (2, -2) and radius 6.

Ex. Find the center and radius of a circle with equation (x-16) 2 +(y+9) 2 =144 Ex. Find the center and radius of a circle with equation (x+8) 2 +(y+3) 2 =121