Term
|
Definition
The points on a line can be paired with the real numbers in such a way that any two points can have coordinates 0 and 1. |
|
|
Term
|
Definition
Once a coordinate system has been chosen in this way, the distance between any two points equals the absolute value of the difference of their coordinates. |
|
|
Term
Segment Addition Postulate |
|
Definition
If B is between A & C then AB+BC=AC. |
|
|
Term
|
Definition
On <-AB-> in a given plane, choose any point O between A & B. Consider OA-> & OB-> and all the rays that can be drawn from O on one side of <-AB->. These rays can be paired with the real numbers from 0 to 180 in such a way that:
a. OA-> is paired with 0, and OB-> is paired with 180
b. If OP-> is paired with x, OQ-> with y, then m |
|
|
Term
Angle Addition Postulate Part 1 |
|
Definition
If point B lies in the interior of |
|
|
Term
Angle Addition Postulate Part 2 |
|
Definition
|
|
Term
Points Containment Postulate |
|
Definition
A line contains at least two points; a plane contains at least three points not all in one line; space contains at least four points points not all in one plane. |
|
|
Term
|
Definition
Through any two points there is exactly one line. |
|
|
Term
|
Definition
Through any three points there is at least one plane, and through any three noncollinear points there is exactly one plane. |
|
|
Term
Points-Line-Plane Postulate |
|
Definition
If two points are in a plane, then the line that contains the points is in that plane. |
|
|
Term
Planes Intersection Postulate |
|
Definition
If two planes intersect, then their intersection is a line. |
|
|
Term
|
Definition
If two lines intersect, then they intersect in exactly one point. |
|
|
Term
|
Definition
Through a line and a point not in the line there is exactly one plane. |
|
|
Term
|
Definition
If two lines intersect, then exactly one plane contains the lines. |
|
|
Term
Addition Property of Equality |
|
Definition
If a = b and c = d, then a + c = b + d. |
|
|
Term
Subtraction Property of Equality |
|
Definition
If a = b and c = d, then a - c = b - d. |
|
|
Term
Multiplication Property of Equality |
|
Definition
|
|
Term
Division Property of Equality |
|
Definition
If a = b and c does not = 0, then a/c = b/c. |
|
|
Term
Substitution Property of Equality |
|
Definition
If a = b, then either a or b can be substituted for the other in any equation (or inequality). |
|
|
Term
Reflexive Property of Equality |
|
Definition
|
|
Term
Symmetric Property of Equality |
|
Definition
|
|
Term
Transitive Property of Equality |
|
Definition
If a = b and b = c, then a = c. |
|
|
Term
Reflexive Property of Congruence |
|
Definition
|
|
Term
Symmetric Property of Congruence |
|
Definition
|
|
Term
Transitive Property of Congruence |
|
Definition
|
|
Term
|
Definition
If M is the midpoint of -AB-, then AM = 1/2AB. |
|
|
Term
|
Definition
If BX-> is the bisector of |
|
|
Term
|
Definition
Vertical angles are congruent. |
|
|
Term
|
Definition
If two lines are perpendicular, then they form congruent Adjacent angles. |
|
|
Term
|
Definition
If two lines form congruent adjacent angles, then the lines are perpendicular. |
|
|
Term
|
Definition
If the exterior sides of two adjacent acute angles are perpendicular, then the angles are complementary. |
|
|
Term
|
Definition
If two angles are supplements of congruent angles (or of the same angle), then the two angles are congruent. |
|
|
Term
|
Definition
If two angles are complements of congruent angles (or of the same angle), then the two angles are congruent. |
|
|
Term
|
Definition
|
|
Term
|
Definition
If two parallel lines are cut by a transversal, then corresponding angles are congruent. |
|
|
Term
|
Definition
If two parallel lines are cut by a transversal, then alternate interior angles are congruent. |
|
|
Term
|
Definition
If two parallel lines are cut by a transversal, then same-side interior angles are supplementary. |
|
|
Term
|
Definition
If a transversal is perpendicular to one of two parallel lines, then it is perpendicular to the other one also. |
|
|
Term
|
Definition
If two lines are cut by a transversal and corresponding angles are congruent, then the lines are parallel. |
|
|
Term
|
Definition
If two lines are cut by a transversal and alternate interior angles are congruent, then the lines are parallel. |
|
|
Term
|
Definition
If two lines are cut by a transversal and same-side interior angles are supplementary, then the lines are parallel. |
|
|
Term
|
Definition
In a plane two lines perpendicular to the same line are parallel. |
|
|
Term
|
Definition
Through a point outside a line, there is exactly one line parallel to the given line. |
|
|
Term
|
Definition
Through a point outside a line, there is exactly one line perpendicular to the given line. |
|
|
Term
|
Definition
Two lines parallel to a third line are parallel to each other. |
|
|
Term
|
Definition
The sum of the measures of the angles of a triangle is 180. |
|
|
Term
|
Definition
If two angles of one triangle are congruent to two angles of another triangle, then the third angles are congruent. |
|
|
Term
|
Definition
Each angle of an equiangular triangle measures 60. |
|
|
Term
|
Definition
In a triangle there can be at most one right angle or obtuse angle. |
|
|
Term
|
Definition
The acute angles of a right triangle are complementary. |
|
|
Term
|
Definition
The measure of an exterior angle of a triangle equals the sum of the measures of the two remote interior angles. |
|
|
Term
|
Definition
the sum of the measures of the angles of a convex polygon with n sides is (n-2)180. |
|
|
Term
|
Definition
The sum of the measures of the exterior angles of any convex polygon, one angle at each vertex, is 360. |
|
|
Term
|
Definition
If three sides of one triangle are congruent to three sides of another triangle, then the triangles are congruent. |
|
|
Term
|
Definition
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. |
|
|
Term
|
Definition
If two angles and the included side of one triangle are congruent to two angles and the included side of another triangle, then the triangles are congruent. |
|
|
Term
The Isosceles Triangle Theorem |
|
Definition
If two sides of a triangle are congruent, then the angles opposite those sides are congruent. |
|
|
Term
The Isosceles Triangle Theorem Corollary 1 |
|
Definition
An equilateral triangle is also equiangular. |
|
|
Term
The Isosceles Triangle Theorem Corollary 2 |
|
Definition
An equilateral triangle has three 60* angles. |
|
|
Term
The Isosceles Triangle Theorem Corollary 3 |
|
Definition
The bisector of the vertex angle of an isosceles triangle is perpendicular to the base at its midpoint. |
|
|
Term
|
Definition
If two angle of a triangle are congruent, then the sides opposite those angles are congruent. |
|
|