Geometry


 * __Angle__**
 * Definition || **__Circle__** || **__Example__** ||
 * Two rays with a common endpoint. ||  ||   ||

__**Sides**__
 * Definition || Drawing || Example ||
 * A ray that is part of an angle. ||  ||   ||


 * __Vertex__**
 * Definition || Drawing || Example ||
 * The common endpoint of two rays that form an angle. ||  ||   ||


 * __Degree__**
 * Definition || Drawing || Example ||
 * The most common unit of unit for angles. ||  ||   ||


 * __Right Angle__**
 * Definition || Drawing || Example ||
 * An angle that measures exactly 90 degrees. It looks like a perfect L. ||  ||   ||


 * __Acute Angle__**
 * Definition || Drawing || Example ||
 * An angle that measures between 0 degrees and 90 degrees. It looks like a skinny L. ||  ||   ||


 * __Obtuse Angle__**
 * Definition || Drawing || Example ||
 * An angle that measures between 90 degrees and 180 degrees. ||  ||   ||


 * __Straight Angle__**
 * Definition || Drawing || Example ||
 * An angle that measures exaclty 180 degrees. It looks like a straight line. ||  ||   ||


 * __Congruent Angle__**
 * Definition || Drawing || Example ||
 * Are angles that are equal. They have the same measure. ||  ||   ||


 * __Vertical Angle__**
 * Definition || Drawing || Example ||
 * Angles formed when two lines intersect. They are opposite each other. All vertical angles are congruent. ||  ||   ||


 * __Complementary Angle__**
 * Definition || Drawing || Example ||
 * The sum of the angles measurement equals 90 degrees. ||  ||   ||


 * __Supplementary Angle__**
 * Definition || Drawing || Example ||
 * The sum of two equals 180 degrees. ||  || [[image:supplementary_angles.jpg width="128" height="124"]] ||


 * __Triangle__**
 * Definition || Drawing || Example ||
 * A polygon with 3 sides. All three angles in a triangle add up to 180 degrees. ||  || [[image:triangle.png width="147" height="133"]] ||


 * __Acute Triangle__**
 * Definition || Drawing || Example ||
 * All interior angles are acute. ||  || [[image:obtuse.jpg width="136" height="135"]] ||


 * __Obtuse Triangle__**
 * Definition || Drawing || Example ||
 * One interior angle is obtuse. ||  || [[image:obtuse.gif width="144" height="102"]] ||


 * __Right Triangle__**
 * Definition || Drawing || Example ||
 * One interior angle is a right angle. ||  || [[image:right_triangel.gif width="136" height="138"]] ||


 * __Scalene Triangle__**
 * Definition || Drawing || Example ||
 * It has no congruent sides or angles ||  || [[image:scalene.jpg width="145" height="127"]] ||


 * __Isoceles Triangle__**
 * Definition || Drawing || Example ||
 * Has two congruent sides and congruent angles. ||  || [[image:isoceles.jpg width="130" height="120"]] ||


 * __Equilateral Triangle__**
 * Definition || Drawing || Example ||
 * It has all sides that are congruent and all angles are congruent. ||  || [[image:equalateral.jpg width="135" height="122"]] ||


 * __Quadrilateral__**
 * Definition || Drawing || Example ||
 * Four sided polygon. Interior angles add up to 360 degrees. ||  || [[image:quad2.jpg width="127" height="132"]] ||


 * __Parallelogram__**
 * Definition || Drawing || Example ||
 * A quadrilateral with both pairs of opposite sides. Parellel = 360 degrees. ||  || [[image:parallelogram2.jpg width="142" height="149"]] ||


 * __Rectangle__**
 * Definition || Drawing || Example ||
 * Parallelogram with four right angles equaling 360 degrees. ||  || [[image:rectangle.jpg width="129" height="132"]] ||


 * __Rhombus__**
 * Definition || Drawing || Example ||
 * Parallelogram with four congruent sides which equals 360 degrees. ||  || [[image:rhombus.jpg width="129" height="134"]] ||


 * __Square__**
 * Definition || Drawing || Example ||
 * A rhombus with four right angles equaling 360 degrees. ||  || [[image:square.jpg width="135" height="128"]] ||


 * __Trapezoid__**
 * Definition || Drawing || Example ||
 * A quadrilateral with exactly one pair of parallal sides which equals 360 degrees. ||  || [[image:trapezoid.jpg width="145" height="152"]] ||

Sizes of the figures that match: If sides of the figure that match the corresponding parts are proportional. ||  ||  ||
 * __Similiar Figures__**
 * Definition || Drawing || Example ||
 * They are shapes that are the same shape but not the same size. All similiar shapes have corresponding parts.


 * __Corresponding Sides__**
 * Definition || Drawing || Example ||
 * Matching sides in a triangle that are the same. ||  ||   ||


 * __Congruent Figures__**
 * Definition || Drawing || Example ||
 * Figures that have the same size and shape. ||  || [[image:congruent.png width="123" height="120"]] ||