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# 8th CK Geometry

### 8th CK Geometric Constructions Using a Compass and Straightedge COMPLETE

Term | Definition |
---|---|

Acute angle | an angle measuring less than 90 degrees |

Acute triangle | a triangle with three acute angle |

Circumscribed circle | A circle is circumscribed about a triangle (or other polygon) when each vertex of the triangle (or other polygon) lies on the circle. |

Compass | tool used to make circles |

Congruent | figures that are exactly the same shape and size |

Equilateral triangle | a triangle with three congruent sides |

Inscribed triangle (or other polygon) | A triangle (or other polygon) is inscribed in a circle if all of its vertices lie on the circle. |

Isosceles triangle | a triangle with two congruent sides |

Obtuse angle | an angle measuring greater than 90 degrees |

Obtuse triangle | a triangle with one obtuse angle |

Parallel | lines in a plane that never intersect |

Parallelogram | a four-sided figure with opposite sides parallel and congruent |

Perpendicular | lines that intersect to form right angles |

Perpendicular bisector | a line perpendicular to the segment that divides the original segment into two congruent segments |

Protractor | an instrument used to measure angles |

Regular hexagon - | A six-sided polygon with all sides and all angles congruent |

Regular polygon | A polygon with all sides congruent and all angles congruent |

Right angle | an angle measuring 90 degrees |

Right triangle | a triangle with one right angle |

Scalene triangle | a triangle with no congruent sides |

Square | a rectangle with four congruent sides |

Straightedge | ruler (with or without numbers or units) |

Transversal | A line that intersects two or more coplanar lines in different points |

Created by:
artisteacher