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Geometry

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
        Help!  

Term
Definition
show If a = b, then a + c = b + c  
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Subtraction Property of Equality   show
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Division Property of Equality   show
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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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show a( b + c ) = ab + ac  
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show Figure a ≅ Figure a  
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Transitive Property of Congruence   show
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Symmetric Property of Congruence   show
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Parallel lines   show
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show Intersect at a 90° angle.  
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Skew lines   show
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Parallel planes   show
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Transversal   show
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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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Corresponding Angle Postulate   show
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Alternate interior angles theorem   show
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show When two parallel lines are cut by a transversal , the resulting alternate exterior angles are congruent .  
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Same side interior angles theorem   show
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Parallel Postulate   show
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Converse of the Alternate Interior Angles Theorem   show
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Converse of the Alternate Exterior Angles Theorem   show
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Converse of the Same-Side Interior Angles Theorem   show
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Converse of the Corresponding Angle Postulate   show
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Linear Pair Theorem   show
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show In a coordinate plane, two non vertical lines are parallel if and only if they have the same slope. Any two vertical lines are parallel.  
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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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show Is the ratio of the rise to run. If (x1,y1) and (x2 and y2) are any two points of the line, the slope of the line is m= y2 - y1 / x2 - x1.  
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Slope   show
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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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Parallel   show
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show  
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show  
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Perpendicular   show
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Dilation   show
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Translation   show
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Reflection   show
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Rotation   show
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show No sides are equal  
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Acute triangles   show
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Equiangular triangles   show
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Right triangle   show
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Obtuse triangle   show
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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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show If three sides of one triangle are congruent to three sides of another triangle, then the triangles are congruent.  
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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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show  
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show  
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