Term

Definition
if two angles are a linear pair, then they are supplementary 


Term
vertical angle conjecture 

Definition
if two angles are vertical, they are congruent 


Term
corresponding angle conjecture 

Definition
if two parallel lines are cut by a transversal, then the corresponding angles are congruent 


Term
alternate interior angle conjecture 

Definition
if two parallel lines are cut by a transversal, then the alternate interior angles are congruent 


Term
alternate exterior angle conjecture 

Definition
if two parallel lines are cut by a transversal, then the alternate exterior angles are congruent 


Term
converse of corresponding angle conjecture 

Definition
if corresponding angles are congruent when two lines are cut by a transversal, then the lines are parallel 


Term
parallel slope conjecture 

Definition
in a coordinate plane, two distinct lines are parallel if and only if the slopes are the same 


Term
perpendicular slope conjecture 

Definition
in a coordinate plane, two lines are perpendicular if and only if the slopes are opposites and reciprical 


Term

Definition
the sum of all the angles in a triangle is 180 


Term

Definition
if two angles of one triangle are congruent to two angles of another triangle, then the triangles' third angle is congruent 


Term
isosceles triangle conjecture 

Definition
if a triangle is isosceles, then the base angles are congruent 


Term
converse of isosceles triangle conjecture 

Definition
if a triangle has two congruent angles, then the triangle is isosceles 


Term
sideangle inequality conjecture 

Definition
in a triangle, the longest side is oppoiste the angle with the biggest measure, and the shortest side is opposite the smallest measure 


Term
triangle inequality conjecture 

Definition
the sum of the lengths of any two sides of a triangle are greater than the lengths of the opposite side 


Term
triangle exterior conjecture 

Definition
the measure of an exterior angle of a triangle is equal to the sum of the remote interior angles 


Term
vertex angle bisector conjecture 

Definition
in an isosceles triangle, the bisector of the vertex angle is also the median to the base and the altitude to the base 


Term
quadrilateral sum conjecture 

Definition
the sum of all the angles in a quadrilateral is 360 


Term

Definition
the sum of all the angles in an ngon is 180(n2) 


Term
equiangular polygon conjecture 

Definition
the measure of one angle in any equiangular polygon can be found with 180(n2) divided by 2 


Term
polygon exterior angle conjecture 

Definition
the sum of the exterior angles in any polygon is 360 


Term

Definition
the diagonals of a kite are perpendicular 


Term
kite diagonal bisector conjecture 

Definition
the diagonal connecting the vertex angles bisects the nonvertex angle bisector 


Term

Definition
the nonvertex angles of a kite are congruent 


Term
kite angle bisector conjecture 

Definition
the vertex angles of a kite are bisected by the vertex diagonal 


Term
trapezoid consecutive angle conjecture 

Definition
consecutive angles between bases are supplementary 


Term
isosceles trapezoid conjecture 

Definition
the base angles in an isosceles trapezoid are congruent 


Term
isosceles trapezoid diagonal conjecture 

Definition
the diagonals in an isosceles trapezoid are congruent 

