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# Math113

### The Circle

Question | Answer |
---|---|

A circle is indicated when both x and y are _____? | squared |

What is the set of all points in a plane that are the same distance from the center? | circle |

What is the standard form of a circle? | (x-h)^2 + (y-k)^2 = r^2 |

(x-h)^2 + (y-k)^2 = r^2 In this equation, what represents the center of a circle? | (h,k) |

What is the radius of a circle? | The distance from the center of the circle to any point of the circle |

Write x^2 + y^2=16 in standard form? | (x-0)^2 + (y-0)^2 = 4^2 |

What is the radius in the equation (x-6)^2 + (y-4)^2 = 25 | √25=5 |

Which way does the parabola open when x is squared and y is not? | the parabola either opens up or opens down |

In the equation x=a(y-k)^2 + h , when does the parabola open to the right? | when a is greater than 0 |

Does the graph of the parabola given by the equation x=-6y^2 open to the left, right, upward, or downward? | to the left |

Created by:
studymath