Definitions, Postulates, Theorems
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30 terms
Terms | Definitions |
|---|---|
 A ________ includes 2 points and all the points between that lie on the line containing the two points | segment |
| A ________ triangle is a triangle with three sides of different lengths | scalene |
| ________ angles are a pair of nonadjacent angles formed by two intersecting lines | vertical |
| An _______ is formed by two rays that share a common endpoint called the ________ | angle, vertex |
| A __________ is an example that proves a statement wrong | counterexample |
| An _________ angle is an angle whose measure is more than 90 but less than 180 | obtuse |
| The bisector of the vertex angle of a right triangle is the ____________ ___________ of the base | perpendicular bisector |
| ______________ lines are lines that intersect to form a right angle | perpendicular |
| An ___________ triangle is a triangle whose angles are all equal in measure | equiangular |
| An _________ __________ is a ray that has an endpoint on the vertex of the angle and divides the angle into two angles of equal measure | angle bisector |
| ___________ points are points that lie on the same line | collinear |
| ___________ lines are lines that lie in the same plane and do not intersect | parallel |
| ___________ angles are two angles whose measures have the sum 180 | supplementary |
| An ________ angle is an angle whose measure is less than 90 | acute |
| A _________ pair is a pair of adjacent such that the exterior sides form a line | linear |
| An ________ triangle is a triangle with three acute angles | acute |
| A ________ of a triangle is a segment connecting a vertex to the midpoint of the opposite side | median |
| A polygon is __________ if all the sides are congruent and all the angles are congruent | regular |
| A _________ is a tool used to measure the size of an angle in degrees | protractor |
| ____________ angles are two angles whose measure have the sum 90 | complimentary |
| A ________ is a quadrilateral with two pairs of consecutive sides congruent | kite |
| A _________ is a quadrilateral with 4 congruent sides | rhombus |
| _________ points are points that lie in the same plane | coplanar |
| A _______ triangle is a triangle with exactly one right angle | right |
| An __________ triangle is a triangle with one obtuse angle | obtuse |
| An ___________ triangle is a triangle with at least two congruent sides | isosceles |
| A ________ angle is an angle whose measure is 90 | right |
| An ________ of a triangle is a segment through a vertex perpendicular to the opposite side | altitude |
| An __________ triangle is a triangle with three sides of equal length | equilateral |
| A _________ ___________ is a line which divides a segment into two equal parts and is also perpendicular to the line segment | perpendicular bisector |
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