Dingo Ate Your Baby
pi r2
Area of a Circle
The number of degrees in a circle
360
When 3 points lie on the same line
Colinear
1/2 bh
Area of a Triangle
A ray that divides an angle into two congruent angles
Angle Bisector
A (blank) is, a statement that is accepted as true without proof.
Postulate or Axiom
A figure formed by two rays, or sides, with a common endpoint called the vertex.
Angle
Congruent Lines
measures greater than 0 degrees and less than 90 degrees.
Acute Angle
Two angles in the same plane with a common vertex and a common side, but no common interior points.
Adjacent Angle
Measures greater than 90 degrees and less than 180 degrees
Obtuse Angle
Two angles whose measures have a sum of 180 degrees
Supplementary Angles
This is the absolute value of the difference of the coordinates.
Distance
length * width
Area of a rectangle
Used to show that two angles are congruent
Arc marks
Angles opposite each other when two lines cross, they are always equal
Vertical Angles
the distance from the center to a side of a regular polygon
has its vertex at the center of a polygon and its sides pass through consecutive vertices.
Regular Polygon
A pair of adjacent angles whose noncommon sides are opposite rays.
Linear Pair
The sum of the side lengths of a figure.
Perimeter
Formed by two opposite rays and measures 180 degrees
Straight Angle
Measures 90 degrees
Right Angle
Two angles whose measures have a sum of 90 degrees.
Complementary Angles
An angle that has the same measure
Congruent angles