Undefined term
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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

CollinearPoints that lie ~ above the very same line.
PlaneA level surface that has no thickness and also extends forever.
LineA straight course that has actually no thickness and extends forever.
PointA place that has actually no size.
CoplanarPoints the lie in the same plane.
EndpointA suggest at an end of a segment or the starting point the a ray.
RayA part of a line that starts in ~ an endpoint and also extends forever in one direction.
PostulateA statement that is accepted as true without proof, additionally called an axiom.
VertexThe usual endpoint of the political parties of an angle.
Opposite raysTwo beam that have actually a common endpoint and form a line.
SegmentA part of a heat consisting of 2 endpoints and all points in between them.
DistanceThe absolute value of the distinction of the coordinates of 2 points.
ConstructionA method of creating a number that is taken into consideration to it is in mathematically precise.
BetweenGiven 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 planeA 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.
CoordinateA number used to determine the location of a point.
Congruent segmentsTwo segment that have the same length.
DegreeA unit of angle measure.
MidpointThe suggest that divides a segment right into two congruent segments.
BisectTo divide into two congruent parts.
AngleA figure formed by two rays v a common endpoint.
MeasureThe use of units to discover a dimension or quantity.
Segment bisectorA line, ray, or segment that divides a segment into two congruent segments.
Vertical anglesThe nonadjacent angles developed by 2 intersecting lines.
Straight angleAn angle formed by two opposite rays that actions 180°.
Acute angleAn angle the measures higher than 0° and less than 90°.
Right angleAn edge that actions 90°.
Interior of one angleThe set of all points in between the political parties of one angle.
Obtuse angleAn angle that measures higher than 90° and less 보다 180°.
Exterior of one angleThe set of all points outside an angle.
Adjacent anglesTwo angle in the same airplane with a common vertex and also a usual side, however no typical interior points.
Complementary anglesTwo angles whose measures have a amount of 90°.
Supplementary anglesTwo angles whose measures have a amount of 180°.
Angle bisectorA beam that divides one angle right into two congruent angles.
Linear pairA pair of adjacent angles who noncommon sides space opposite rays.
Congruent anglesAngles that have actually the very same measure.
ImageA shape that outcomes from a transformation of a figure.
PreimageThe original figure in a transformation.
ReflectionA revolution across a line.
TransformationA change in the position, size, or form of a figure.
RotationA revolution about a suggest P, such that each suggest and its photo are the exact same distance native P.
TranslationA transformation in which all the clues of a number move the same distance in the very same direction.
legOne the the two sides the the right triangle that kind the best angle.
AreaThe number of nonoverlapping unit squares of a given size that will exactly cover the interior of a plane figure.
HypotenuseThe side opposite the appropriate angle in a right triangle.
LengthThe distance in between the two endpoints the a segment.
baseAny next of a triangle.
HeightAsegment from a vertex that creates a best angle through a heat containing the base.
RadiusA 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.
PerimeterThe sum of the next lengths the a closed airplane figure.
piThe proportion of the circumference of a circle come its diameter, denoted through the Greek letter π.
CircumferenceThe distance about the circle.

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