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36 Cards in this Set
- Front
- Back
point
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simply a location
We name it using a capital letter |
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line
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made up of points and has no thickness of width
It always has an arrow at each end. We name it using 2 points on the line. |
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colinear
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points on the same line
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plane
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a flat surface made up of points
We name it using 3 points on the plane. |
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coplanar
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points and/or lines that lie on the same plane
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space
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a boundless, three-dimensional set of all points (contain lines and planes)
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segment
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a finite portion of a line
It can be measured because it has two endpoints (unlike a line!) |
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congruent
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segments or angles that have the same measure
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midpoint
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the point halfway between the endpoints of the segment
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segment bisector
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any segment, line or plane that intersects a segment at its midpoint
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ray
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part of a line
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angle
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formed by 2 noncollinear rays
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rays
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the sides of an angle
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vertex
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the common endpoint of an angle
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right angle
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an angle that measures exactly 90°
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acute angle
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an angle that measures less than 90°
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obtuse angle
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an angle that measures greater than 90°
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angle bisector
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a line or ray that divides an angle into 2 congruent angles
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adjacent angles
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two angles that lie in the same plane, have a common vertex, and a common side, but no common interior points
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vertical angles
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two nonadjacent angles formed by two intersecting lines
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linear pair
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a pair of adjacent angles whose noncommon sides are opposite rays
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complementary angles
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two angles whose measures have a sum of 90
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supplementary angles
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two angles whose measures have a sum of 180
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perpendicular lines
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lines that form right angles
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polygon
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a closed figure formed by a finite number of coplanar segments such that:
(1) the sides that have a common endpoint are noncollinear, and (2) each side intersects exactly two other sides, but only at their endpoints. |
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concave polygon
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a polygon such that there is a line containing a side of the polygon that also contains a point of the interior of the polygon
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convex polygon
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a polygon such that there is no line containing a side of the polygon that also contains a point of the interior of the polygon.
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n-gon
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a polygon with n sides.
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regular polygon
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a convex polygon with all sides congruent and all angles congruent.
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perimeter
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the sum of the lengths of the sides of a polygon
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distance formula
(number line) |
the distance between two points on a number line
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distance formula
(coordinate plane) |
the distance between two points on a coordinate plane
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midpoint formula
(number line) |
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midpoint formula
(coordinate plane) |
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midpoint formula
(coordinate plane) |
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names of polygons
number of sides: 3, 4, 5, 6, 7, 8, 9, 10, 12, & n |
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