Angles 1
This type of angle measures 90o
Right Angle
This type of angle measures 180o
Straight angle or straight line
The sum of the 3 angles in a triangle.
180o
Splits an angle into 2 congruent parts.
Angle bisector
When we plug in one quantity for an equivalent quantity.
Substitution
Angles that sum to 90o
Complementary Angles
Angles that sum to 180o
Supplementary Angles
A triangle that has 2 congruent sides and 2 congruent angles.
Isosceles triangle
Splits a line segment into 2 congruent parts.
Segment bisector
This property says that any quantity is equal to itself.
The Reflexive Property
Angles that are across from each other and are congruent
Vertical angles
Angles on opposite sides of transversal and inside parallel lines, are congruent.
Alternate Interior Angles
The point of concurrency of the 3 perpendicular bisectors in a triangle
Circumcenter
Lines with the same slope.
Parallel lines
This property says that if one quantity equals a second quantity then that second quantity also equals the first.
The Symmetric Property
Angles on opposite sides of transversal and outside parallel lines, are congruent
Alternate exterior angles
Angles that are on same side of transversal, inside parallel lines, are supplementary
The point of concurrency of the 3 medians in a triangle
Centroid
This property compares three equivalent figures or quantities.
The Transitive Property
Angles that are in the same position at the intersection, are congruent
Corresponding angles
Angles that are next to each other
Adjacent angles
Name 4 ways that we could prove two triangles are congruent
SSS, SAS, ASA, AAS
A line that intersects two or more lines.
Transversal
The Converse of a Theorem means...
Opposite