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71 Cards in this Set
- Front
- Back
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Point
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the basic unit of geometry. It has no size. it is infinitely small.
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Line
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straight arrangement of points. It has infinite length but no thickness
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Plane
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length and width but no thickness. It is a flat surfrace that extends forever.
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collinear points
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points that lie on the same line
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Coplanar points
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points that lie on the same plane
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space
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the set of all points
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line segment
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consists of two points and all the points between them that lie on the line containing the two points
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end points
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the two points at the end of a line segment
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The line AB may be written as...
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__ __
AB or BA |
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Ray
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part of a line that contains point A and all the points that are on the same side of point A.
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Ray AB is written as...
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__(arrow)
AB |
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Vertex
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The common end point of two rays that form an angle.
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Sides of an Angle
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the two rays that meet in vertex
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Measure of an Angle
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the smallest amount of rotation necessary from the overlapping position to thefinal angle.
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degrees
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the unit used for the measure of an angle
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protractor
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the grometric tool used to measure the number of degrees in an angle
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Congruent segments
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two segments that the same meassure
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Congruent angles
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two angles that are the same in measure
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Incoming angle
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the angle formed by the cushion and the path of the ball approaching the chushion.
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outgoing angle
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the angle formed by the cushion and the path of the ball leaving the cushion
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Converse
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reverse statement
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Acute angle
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An angle that s less than 90 degrees
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Obtuse angle
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an angle that is over 90 degrees
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minpoint
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The exact middle of a line segment
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angle bisector
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a line that cut an angle exactly in half
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Parallel lines
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two lines that are on the same plane and go in the same direction. They never touch and they are always equidistance from eachother
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Perpendicular lines
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Two lines that meet at a 90 degree angle
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Pair of complemetary angles
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two angles that add up to be 90 degrees
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subpplementary angles
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two angles that add up to be 180 degrees
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Verticle angles
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oppsite angles that equal eachother
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polygon
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closed geometric figure in a plane formed by connecting line segments endpoint to endpoint with each segent interecting exactly two others.
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Convex polygon
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a polygon in which no segment connecting two vertices is outside the polygon
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concave polygon
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polygon in which at lesat one segment connecting two vertices is outside the polygon
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consecutive vertices
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two vertices of a polygon that are connect by a side
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consecutive sides
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two sides that share a common vertex
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congruent polygons
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polygons that are exazctly the same size and shape
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perimeter
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the sum of the lengths of its sides
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diagonals of polygons
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a line that connects to angles that are not next to eachother
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equilateral polygons
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polygons whose sides are all the same length
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equiangular polygons
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polygon whose angles are the same measure
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regular polygons
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a polygons whose sides and angles are all equal
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right triangle
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a triangle that who has one angle that equals 90 degrees
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acute triangle
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a triangle whose angles are all under 90 deprees
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obtuse triangle
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triangle who has one angle greater than 90 deprees
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scalene triangle
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triangle that none of the sides are the same measure
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isosceles triangle
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a trianle who has two sides that are the same measure
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medians of triangles
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a line from the top to the bottom of a triangle that cuts the base exactly in half
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altitude of a triangle
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a line that describes the height of the triangle. A triangle has three different altitudes
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trapezoids
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a four sided figure inwhich two of the sides are parallel and the other two are not
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kites
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a four sided figure in which two consecutive sides are the same and the other two consecutive sides are the same size.
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parallelograms
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a four sided shape whose opposet sides are parallel
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rhombuses
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any shape whose angles are directly across from eachother (all sides are equal)
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rectangles
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a four sided shape whose angles are all 90 degrees
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square
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all angles are 90 degrees and all sides are the equalateral
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prism
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a shape shapes that are connected in height
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pyramid
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a base that meets in a point. It has a height
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cylinder
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two circles that connected by a height
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sphere
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a globe like shape.
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hemisphere
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have of a globe
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perpendicular bisetor
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line that divides the line segment into two congruent parts (bisects it) and that is also perpendicular to the line segment
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transversal
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a line intersecting two or more other coplanar lines
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corresponding angles
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angles that lie on the same place in each line
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alternate interior angles
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two angles are the inside of the Z that have the same measure
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alternate exterior angles
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two angles that are on the outside of the Z that are the same measure
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y intercept
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the point at which a line crosses the y axis
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probability
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a measure of the likelihood that an event will have a particular outcome
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vertex angle
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the angle between the two sides of equal lengths
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base angles
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two angles on the side of the base
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base
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the side between the two base angles
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side side side
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three paris of congruent sides.. a way to tell congruency
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x+x, y+y
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midpoint of a line segment
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