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Circle Eq/Graph/Voca
Equations, Graphs and Vocabulary for Circles
| Question | Answer |
|---|---|
| What is the center and radius for: (x-4)^2+(y+3)^2=36? | Center: (4, -3), Radius: 6 |
| How do you write the equation of a circle with a center at (-2,1) and a radius of 7? | (x+2)^2+(y-1)^2=49 |
| What do you always have to do to the radius when putting it into the equation's standard form? | Square the radius |
| What do you always have to do with the center when putting it into the equation's standard form? | Change the sign |
| True or False: A Diameter always runs through the center of the circle | True: It goes through the circle center, cutting the circle into two equal parts. |
| True or False: A Tangent Line touches the edge of a circle at 2 points | False: A Tangent Line touches the edge of a circle at only one point, and is never inside the circle. |
| True or False: A Secant Line touches the edge of a circle at 2 points | True: A Secant Line touches the edge of a circle at exactly 2 points, and goes through the inside of the circle. |
| The Graph of (x-3)^2+(y-3)^2=9 is tangent to what axes? | The graph of this circle is tangent to both the x- and the y-axes |
| A central angle is: | An angle with the vertex at the center of the circle |
| An inscribed angle is: | An angle with the vertex on the circle |
| An exterior angle is: | An angle formed by tangent and/or secant lines outside the circle |
| An interior angle is: | An angle formed inside the circle, but with a vertex not at the center point |
Created by:
julie.barker
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