Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

Normal Size Small Size show me how

Normal Size Small Size show me how

# DG Unit 1

### vocabulary from Ch 1 of Discovering Geometry

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

an angle that measures 90° | Right Angle |

a angle that measures between 0° and 90° | Acute angle |

an angle that measures between 90° and 180° | Obtuse Angle |

two or more lines in the same plane that never meet | Parallel Lines |

two lines that meet at 90° angles | Perpendicular Lines |

are formed by two intersecting lines; they share a common vertex but not a common side | Pair of Vertical Angles |

share a vertex and a common side and their non-common sides form a straight line | Pair of Linear Angles |

a pair of angles whose sum is 90° | Pair of Complementary Angles |

a pair of angles whose sum is 180° | Pair of Supplementary Angles |

closed figure in a plane, formed by connecting line segments endpoint to endpoint with each segment intersecting exactly two others. | Polygon |

a line segment that connects two nonconsecutive vertices | Diagonal |

no diagonals are outside the polygon | Convex Polygon |

polygon whose sides have equal length | Equilateral Polygons |

polygon whose angles have equal measure | Equiangular Polygons |

polygon that is both equilateral and equiangular | Regular Polygons |

triangle that has one right angle | Right Triangle |

a triangle with 3 acute angles | Acute Triangle |

a triangle with one obtuse angle | Obtuse Triangle |

a triangle with no congruent sides | Scalene Triangle |

a triangle with three congruent sides | Equilateral Triangle |

a triangle with a least two congruent sides | Isosceles Triangles |

a quadrilateral with exactly one pair of parallel sides | Trapezoid |

a quadrilateral with distinct pairs of consecutive congruent sides | Kite |

a quadrilateral with two pairs of parallel sides | Parallelogram |

an equiangular parallelogram | Rectangle |

an equilateral parallelogram | Rhombus |

a regular quadrilateral | Square |

the set of all points in a plane at a given distance(radius) from a given point (center) in the plane | Circle |

Radius | a segment from the center of the circle to a point on the edge of the circle |

is a line segment containing the center, with its endpoints on the circle | Diameter |

two or more coplanar circles that share the same center | Concentric Circles |

is two points on the circle and the continuous (unbroken) part of the circle between the two points | Arc of a Circle |

an arc of a circle that is smaller than a semicircle | Minor Arc |

an arc of a circle larger than a semicircle | Major Arc |

an arc of a circle whose endpoints are the endpoints of a diameter | Semicircle |

an angle with its vertex at the center of the circle, and sides passing through the endpoints of an arc | Central Angle |

a line segment whose endpoints lie on the circle | Chord |

a line that intersects the circle only once | Tangent |

Created by:
krolakd