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20 Cards in this Set
- Front
- Back
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Midpoint
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The point that divides a segment into two congruent segments
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Supplementary Angles
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Two angles whose measures have a sum of 180
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Segment Bisector
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A line that divides a segment into two congruent segments
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Acute Angle
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An angle whose measure is less than 90
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Angle Bisector
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A ray that divides an angle into two congruent angles
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Linear Pair
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the two angles formed by the endpoint of a ray when the endpoint falls on a line; tow adjacent angles whose noncommon sides are opposite rays; two supplementary angles that reside on a line
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Right Angle
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An angle with a measure of 90
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Complementary angles
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Two angles whose measure have a sum of 90
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Perpendicular
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Lines intercept to form right angles
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Obtuse Angle
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An angle whose meausure is greater than 90 and less than 180
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Perpendicular Bisector
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A line that is perpendicular to a segment at its midpoint
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Coplanar
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Lying in the same plane
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Ray
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A part of a line that starts at a point and extends infedentely in one direction
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Endpoints
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A point at the end of a segment or the starting of a ray
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Postulate
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A statement that is accepted true without proof
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Concurrent Lines
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litterally "running together; of three of more lines interacting at a single point
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Segment
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A part of a line that begins at one point and ends at another; a segment of a line has two endpoints
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Congruent
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The relationship between figures having the same size and shape; congruent segments are segments that match exactly
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Undefined Terms
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Point, Lines, and Plane; because they are so basic they are not defined by other figures
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Vertex
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A point where the edges of a figure intercect; plural - vertices
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