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Geometry

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Term
Definition
Addition Property of Equality   show
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Subtraction Property of Equality   show
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show If a = b, then ac = bc  
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Reflexive Property of Equality   show
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show If a = b, then b = a  
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show If a = b, then b can be substituted for a in any expression.  
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Distributive Property of Equality   show
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Reflexive Property of Congruence   show
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Transitive Property of Congruence   show
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show If figure a ≅ figure b, then figure b ≅ figure a  
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show Are coplanar and do not intersect.  
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Perpendicular lines   show
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show Not coplanar and not parallel, do not intersect.  
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show Planes that do not intersect.  
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show Is a line that intersects two coplanar lines at two different points.  
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Corresponding angles   show
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show Are non adjacent angles that lie on the opposite sides of the transversal. They are congruent.  
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show Lie on the opposite side of the transversal. They are congruent  
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Same-side interior angles   show
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show If two lines are cut by a transversal, then the pairs of corresponding angles are congruent.  
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Alternate interior angles theorem   show
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Alternate exterior angles theorem   show
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show when two lines that are parallel are intersected by a transversal line, the same-side interior angles that are formed are supplementary, or add up to 180 degrees.  
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show Through a point p not on line l, there is exactly one line parallel to l  
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Converse of the Alternate Interior Angles Theorem   show
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show If two coplanar lines are cut by a transversal so that a pair of alternate exterior angles are congruent, then two lines are parallel.  
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Converse of the Same-Side Interior Angles Theorem   show
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show If two coplanar lines are cut by a transversal so that a pair of corresponding angles are congruent, then the two lines are parallel.  
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Linear Pair Theorem   show
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Parallel lines theorem   show
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show In a coordinate plane, two non vertical lines are perpendicular if and only if the product of their slope is -1. vertical and horizontal lines are perpendicular.  
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The Slope of a Line   show
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show Is a line that describes the steepness of the line.  
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Undefined   show
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Positive slope   show
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show Line comes from right to left  
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0 slope   show
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show Vertical Undefined X only equation Horizontal 0 zero Y only  
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show Have the same slope but different y intercept  
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Coincide   show
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Intersect   show
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Perpendicular   show
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show (x,y) - (kx, ky) , K> 0  
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Translation   show
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Reflection   show
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Rotation   show
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Scalene triangles   show
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show Three acute angles  
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show Three congruent acute acute angles  
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Right triangle   show
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show One obtuse angle  
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Equilateral   show
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Scalene   show
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show Atleast two congruent sides  
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SSS   show
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show If two sides and the included angle of one triangle are congruent to two sides and the included angle of another triangle, then the triangles are congruent.  
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ASA   show
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AAS   show
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HL   show
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