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23 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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line segment
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A piece of line with two end points.
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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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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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ray
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part of a line with on end point . A ray extends indefinitely in one direction . ( has one point in one end and arrow on the other )
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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 share a common side. they are formed by intersecting lines are supplementary that have the sum of 180 degrees
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vertical angles
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when two lines intersect, four angles are formed. two angles that are opposite to each other are called vertical angles.
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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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Straight angle
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straight line that measures 180 degrees
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Parallel Lines
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Two lines that never meet .
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