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# 11754-2015

### Math - Lines, Rays, Perpendicular lines

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

What is a point? | It is an exact location. A dot. |

What is a line? Hint: How many dots or arrows? | A line is a straight path that goes on forever with arrows on each end. <-------------------> |

What is a ray? Hint: How many dots or arrows? | A ray has a starting point, then an arrow that goes on forever. @------------> |

What is a line segment? Hint: How many dots? | A line segment has two dots. @----------@ |

What are congruent line segments? | They are line segments that have the same length. ====== dots on each line. |

What is a midpoint of a line? Hint: Middle | A midpoint is the middle of a line that has a dot. -----@------- |

What is a plane? Hint: You do not fly in it. | A plane is a flat surface that extends forever in all directions. |

What are intersecting lines? | They are two lines that meet at one point. They intersect like two roads. Like the letter " X " |

What are parallel lines? | Parallel lines never touch or meet. Like an "equals" sign. ==== |

What are perpendicular lines? | Perpendicular lines intersect at a 90 degree angle to each other. Like the letter " t " |

What does this mean CD with a solid line over it? | CD with a solid line means it is a "line segment" |

What does CD mean with one arrow over it? | CD with a arrow over it means it is a ray that starts and never ends. |

What does CD with an arrow in two directions over it mean? | CD with two arrows over it mean the ray goes forever in each direction. |