A line that extends indefinitely in one direction
A ray
If a=b, then a+c=a+b
Addition Property
A triangle with 1 right angle
Right Triangle
If two lines are cut by a transversal so that a pair of corresponding angles are congruent, then the lines are parallel
Corresponding Angles Converse
How are <1 and <8 congruent?
Alternate Exterior Angles
A flat surface made up of points and extends in all directions
A plane
a(b+c), then a(b+c)= ab+ac
A triangle with 3 congruent angles
Equal angular triangle
If two angles are vertical, then they are congruent because...
Verticle Angles Theorem
How are <2 and <6 congruent
Corresponding Angles
A measurable part of a line consisting of two endpoints
Line Segment
If a=b, and a=c, then a=c
Transitive Property
A triangle with 2 equal sides
Isosceles triangle
If two lines are cut by a transversal so that a pair of alternate interior angles are congruent, then the lines are parallel
Alternate Interior Angles Converse
How is <5 and <3 congruent?
Consecutive Interior Angles/ Same Side Interior Angles
The formula used to find the midpoint between two points on a coordinate plane
Distance Formula
If a=b, then b=a
Symmetric Property
A triangle with 3 different sides
Scalene triangle
If 2 angles are supplementary to the same angle, then they are congruent because...
Congruent Supplements Theorem
How are <3 and <2 congruent
Vertical Angles Converse
A line, segment, or ray perpendicular to a segment at its midpoint
Perpendicular Bisector
If 10x+w=41 and w=1, then 10x+1=41
Substitution Property
A triangle with 3 equal sides and 3 equal angles
An equal angular, equilateral
If 2 angles form a linear pair, then they are congruent because...
Linear Pair Theorem
What are all possible angles congruent to <7
<6, <3, and <2