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A an easy figure that is not defined in state of various other figures. You are watching: A part of a line that starts at one endpoint and extends forever | |

Collinear | Points that lie ~ above the very same line. |

Plane | A level surface that has no thickness and also extends forever. |

Line | A straight course that has actually no thickness and extends forever. |

Point | A place that has actually no size. |

Coplanar | Points the lie in the same plane. |

Endpoint | A suggest at an end of a segment or the starting point the a ray. |

Ray | A part of a line that starts in ~ an endpoint and also extends forever in one direction. |

Postulate | A statement that is accepted as true without proof, additionally called an axiom. |

Vertex | The usual endpoint of the political parties of an angle. |

Opposite rays | Two beam that have actually a common endpoint and form a line. |

Segment | A part of a heat consisting of 2 endpoints and all points in between them. |

Distance | The absolute value of the distinction of the coordinates of 2 points. |

Construction | A method of creating a number that is taken into consideration to it is in mathematically precise. |

Between | Given three points A, B, and also C, B is in between A and C if and also only if all 3 of the point out lie ~ above the same line, and abdominal + BC = AC. |

Coordinate plane | A aircraft that is split into 4 regions by a horizontal line referred to as the x-axis and a vertical line dubbed the y-axis. |

Coordinate | A number used to determine the location of a point. |

Congruent segments | Two segment that have the same length. |

Degree | A unit of angle measure. |

Midpoint | The suggest that divides a segment right into two congruent segments. |

Bisect | To divide into two congruent parts. |

Angle | A figure formed by two rays v a common endpoint. |

Measure | The use of units to discover a dimension or quantity. |

Segment bisector | A line, ray, or segment that divides a segment into two congruent segments. |

Vertical angles | The nonadjacent angles developed by 2 intersecting lines. |

Straight angle | An angle formed by two opposite rays that actions 180°. |

Acute angle | An angle the measures higher than 0° and less than 90°. |

Right angle | An edge that actions 90°. |

Interior of one angle | The set of all points in between the political parties of one angle. |

Obtuse angle | An angle that measures higher than 90° and less 보다 180°. |

Exterior of one angle | The set of all points outside an angle. |

Adjacent angles | Two angle in the same airplane with a common vertex and also a usual side, however no typical interior points. |

Complementary angles | Two angles whose measures have a amount of 90°. |

Supplementary angles | Two angles whose measures have a amount of 180°. |

Angle bisector | A beam that divides one angle right into two congruent angles. |

Linear pair | A pair of adjacent angles who noncommon sides space opposite rays. |

Congruent angles | Angles that have actually the very same measure. |

Image | A shape that outcomes from a transformation of a figure. |

Preimage | The original figure in a transformation. |

Reflection | A revolution across a line. |

Transformation | A change in the position, size, or form of a figure. |

Rotation | A revolution about a suggest P, such that each suggest and its photo are the exact same distance native P. |

Translation | A transformation in which all the clues of a number move the same distance in the very same direction. |

leg | One the the two sides the the right triangle that kind the best angle. |

Area | The number of nonoverlapping unit squares of a given size that will exactly cover the interior of a plane figure. |

Hypotenuse | The side opposite the appropriate angle in a right triangle. |

Length | The distance in between the two endpoints the a segment. |

base | Any next of a triangle. |

Height | Asegment from a vertex that creates a best angle through a heat containing the base. |

Radius | A segment who endpoints space the center of a circle and a point on the circle, or the distance from the facility of a circle to any point on the circle. |

Perimeter | The sum of the next lengths the a closed airplane figure. |

pi | The proportion of the circumference of a circle come its diameter, denoted through the Greek letter π. |

Circumference | The distance about the circle. See more: How Is Symbolism In The Lady Or The Tiger ? Symbols, Allegory And Motifs |

Diameter | A segment that passes v the facility of a circle and also whose endpoints are on the circle, or the size of together a segment. |