A
Adjacent Interior Angle:
Two angles that share a common side and a common vertex, but do not overlap |
B
Base(N):The surface that a solid object stands on, or the bottom line of a shape such as a triangle or rectangle.
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Base angle of an isosceles triangle:
The angle that is formed by the base and one leg in an isosceles triangle. The base angles are always equal. |
C
Coordinate:
the use of algebra to study geometric properties; operates on symbols defined in a coordinate system |
CPCTC:
Corresponding Parts of Congruent Triangles are Congruent |
Contrapositive:
If two angles are not congruent, then they are not right angles. |
Conjecture:
Conjecture is a statement that is believed to be true but not yet proved. |
Counterexample: Counterexample is an example that is used to disprove a statement.
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Conditional Statement:
A conditional statement, symbolized by pq, is an if-then statement in which p is a hypothesis and q is a conclusion. |
D
E
exterior angle(N):
The angle between a side of a rectilinear figure and an adjacent side extended outward. |
F
flowchart:
A diagram that shows step-by-step progression through a procedure or system especially using connecting lines and a set of conventional symbols |
G
H
I
Included angle:
The angle made by two lines with a common vertex |
Included side:
The side between two consecutive angles of a polygon. |
Inverse:
If two angles are not right angles, then they are not congruent. |
K
L
Legs(N):
In a right triangle, a leg is either of the two sides that form the right angle. |
P
Pentagonal pyramid:is a pyramid with a pentagonal base upon which are erected five triangular faces that meet at a point
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R
Ray:
A line which starts at a point with given coordinates, and goes off in a particular direction to infinity, possibly through a second point. |
remote interior angle:
Are the two angles inside the triangle that do not share a vertex with the exterior angle |
S
SSA(Side,Side,Angle)Triangles are congruent when all corresponding sides and interior angles are congruent. The triangles will have the same shape and size, but one may be a mirror image of the other.
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SAS(Side,Angle,Side):
Triangles are congruent if any pair of corresponding sides and their included angles are equal in both triangles. |
SSS(side,side,side):Triangles are congruent if all three sides in one triangle are congruent to the corresponding sides in the other.
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Straightedge:
An idealized mathematical object having a rigorously straight edge which can be used to draw a line segment. |
T
V
vertex angle of an isosceles triangle(
In an isosceles triangle, the angle formed by the two legs of equal length. The vertex angle is always opposite the base. |
All definition sourced from http://www.mathsisfun.com/