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# geometrymidtermexam

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

An angle with a measure between 0 degrees and 90 degrees. | acute angle |

Two angles that share a common vertex and side, but have no common interior points. | adjacent angles |

A segment that originates at the vertex of a triangle and makes a right angles with the line that contains the opposite side. | altitude |

A segment that divides an angle of a triangle into two equal parts. | angle bisector |

Two true conditional statements that are converses of each other. | biconditional |

Point of intersection of the medians. | circumcenter |

Two angles whose sum of their measures is 90 degrees. | complementary angles |

Three or more lines that intersect at one point. | concurrent lines |

Two geometric figures that are the same size and shape. | congruent figures |

An unproved statement that seems to be true. | conjecture |

The statement formed by switching the hypothesis and conclusion of a conditional statement. | converse |

The statement formed when you negate the hypothesis and conclusion of the converse of a conditional statement. | contrapositive |

An example that shows a conjecture is false. | counterexample |

A polygon with 10 sides. | decagon |

Reasoning logically from accepted facts. | deductive reasoning |

A polygon with 12 sides. | dodecagon |

A triangle with 3 congruent angles. | equiangular triangle |

A triangle with 3 congruent sides. | equilateral triangle |

A polygon with 7 sides. | heptagon |

A polygon with 6 sides. | hexagon |

Point of intersection of the angle bisectors. | incenter |

Reasoning that includes making conclusion based on observations. | inductive reasoning |

The statement formed when you negate the hypothesis and conclusion of a conditional statement. | inverse |

A triangle with at least 2 congruent sides. | isosceles triangle |

Two adjacent angles whose non-common sides are opposite rays. | linear pair |

A segment that connects a vertex of a triangle to the midpoint of the opposite side. | median |

A point that divides a segment into 2 congruent segments. | midpoint |

A polygon with 9 sides. | nonagon |

An angle whose measure is between 90 degrees and 180 degrees. | obtuse angle |

A polygon with 8 sides. | octagon |

Point of intersection of the altitudes. | orthocenter |

Two coplanar lines that do not intersect. | parallel lines |

A polygon with 5 sides. | pentagon |

A segment that intersects the side of a triangle at its midpoint and makes a right angle. | perpendicular bisector |

Lines that intersect to form a right angle. | perpendicular lines |

A statement that is accepted as true without proof. | postulate |

A polygon with 4 sides. | quadrilateral |

A set of points extending infinitely in one direction. | ray |

A polygon that is both equiangular and equilateral. | regular polygon |

An angle with the measure of 90 degrees. | right angle |

A triangle with no congruent sides. | scalene triangle |

A part of a line with two endpoints. | segment |

Two non-coplanar lines that do not intersect. | skew lines |

The set of all points. | space |

An angle with the measure of 180 degrees. | straight angle |

Two angles whose sum measures 180 degrees. | supplementary angles |

A statement that must be proved to be true. | theorem |

A line that intersects two or more coplanar lines at different points. | transversal |

Two angles whose sides form two sets of opposite rays. | vertical angles |

Created by:
kwillcockson