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Math Terms

9th Grade Youndt Math Terms

Def. Of Midpoint A point in the center of a line that divides them into 2 equal segments
Def. of Angle Bisector A ray that intersects an angle creating 2 angles
Def. of Supp. angles 2 angles that equal 180 when added together
Def of Comp. angles 2 angles that equal 90 when added together
Def. of Right Angle An angle that is 90 degrees
Def. of perpindicular lines Lines that intersect at a point
Vertical Angle Theorem Vertical Angles are congruent
Corresponding Angles Angles in the same position
Alternate interior angles Angles on opposite sides of a lone that are congruent
Same side interior angles Angles on the same side of a line that are congruent
All right angles are congruent (blank)
Same Side Interior Theorem If a transversal intersects two parallel lines, then a
Alternate Interior Angle Theorem If a transversal intersects 2 parallel lines, then alternate interior angles are congruent
Symmetric Property of Equality If a=b then ba
Symmetric prop of Congruence If AB=CD then CD=AB
Transitive Prop of equality If a=b and b=c then a=c
Transitive prop of congruence If AB=CD and CD=Ef then AB=EF
If two angles are congruent and supplementary Each is a right angle
If two lines are perpendicular to the same line Then the lines are parallel
If two lines are parallel to the same line then the lines are perpendicular to each other
Created by: bluehicke35