Geometry – Flashcards with Answers
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CYS
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Cheyenne, WY
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Opposite Ray
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Two rays that point in opposite directions
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Congruent Angles
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No measurements
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Line
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Stretches in 2 directions forever
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Obtuse Angle
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Larger than 90A° less than 180A°
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Ray
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A portion of a line with only one endpoint
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Congruent segment
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Same size and shape
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Angle bisector
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Divide an angle into 2 congruent angles
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Acute Angle
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Less than 90A°
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Supplementary Angle
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2 angles whose sum is 180A°
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Postulate
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A basic fact assumed to be true as a basic for reasoning
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Adjacent Angle
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2 Angle in the same place that have a common vertex and side
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Perpendicular Bisector
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A line ray or segment that bisects another segment at a right angle
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Linear pair
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Adjacent Angle formed by 2 intersecting lines
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Angle Addition
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If b is the interior of <AOC. Then M<BOC = M<AOC
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Plane
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A flat surface
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Segment Addition
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If A,B and C are collinear and B is between A and C then AB+BC =AC
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Equal
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Same value
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AAS
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2 angles congruent and a side not between them is congruent
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ASA
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2 Angle congruent and the side between them are congruent
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Perpendicular lines
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2 lines that intersect to form right angles
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SAS
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Show 2 sides are congruent and the angles between them is congruent
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Coplanar
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3 non- collinear points on the same plane
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Segment
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A portion of a line that has 2 end points
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Point
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A location in space
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Segment bisector
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Passes through the midpoint
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Collinear
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Points that lie along the same line
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Right angle
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90A°
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Midpoint
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Divides a segment into 2 congruent segment points
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Complementary angle
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2 angles where sum is 90 degrees
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SSS
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Show all 3 sides are congruent
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Straight Angle
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An angle that measures 180A°
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Vertical angle
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Non adjacent Angle formed by 2 inter securing lines
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Theorem
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A non intuitive truth proven by a chain of reasoning
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HL
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Hypotenuses are congruent and one leg is congruent and a right angle
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Geometry
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Study of shapes
