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### 54 Cards in this Set

• Front
• Back
 Point A position in space that has no dimension Line A never ending straight path Ray (a line with) 1 endpoint Line Segment (a piece of a line with) 2 endpoints Intersecting Line 2 lines that meet at 1 point Perpendicular Line Lines that meet to form a right angle Plane A flat surface that extends in all directions Parallel Lines Lines on the same plane that will never meet Skew Lines Lines not in the same plane that will never meet Right Angle 90º Acute Angle >90º Angle A figure formed by 2 rays extending from 1 vertex Obtuse Angle <90º but >180º Straight Angle 180º Reflex Angle <180º Adjacent Angles Angles that share a common vertex and a common ray Vertex A point in an angle where 2 rays meet Vertical Angle 2 non-adjacent angles formed when 2 lines intersect They are Congruent Corresponding Angles Angles that match in position when a parallel lines are cut by a transversal They are congruent Alternate Interior Angles They are congruent Alternate Exterior Angle They are congruent Complementary Angles 2 angles whose sum is 90º Supplementary Angles 2 angles whose sum is 90º Transversal A line that intersects 2 angles Equilateral Triangle A triangle with all sides and angles congruent. All angles 60º Isosceles Triangle A triangle with at least 2 congruent sides 2 equal angles on the different sides are congruent Scalene Triangle A triangle with no congruent sides Right Triangle A triangle with 1 right angle Obtuse Triangle A triangle with 1 obtuse angle Acute Angle A triangle with 3 acute angles Equilateral Triangle A triangle with all sides and angles congruent Polygon A many sided figure Triangle A three sided figure Quadrilateral A 4 sided figure 360º Pentagon A 5 sided figure 540º Hexagon A 6 sided figure 720º Septagon or Heptagon A 7 sided figure 900º Octagon An 8 sided figure 1080º Nonagon A 9 sided figure 1260º Decagon A 10 sided figure 1440º Dodecagon A 10 sided figure 1620º A Regular Polygon A sides and angles the same Parallelogram A quadrilateral 2 pairs of parallel sides Rectangle A parallelogram with a right angle Rhombus A parallelogram congruent sides There are no right angles Square A special Rectangle with congruent sides A Special Rhombus with 1 right Angle Trapeziod A Quadrilateral with exactly 1 pair of parallel sides Kite Quadrilateral with 2 pairs of adjacent and congruent sides Circle A plane with all parts equidistant from a given point called the center Diameter A chord that passes the center of the circle 2 radius Radius A line segment that connects the center and any point on the circle Central Angle An angle whose vertex is the center of the circle and whose rays contain the radii of of the circle Inscribe Angle an angle whose vertex lies on the circle and whose rays contain chords of the circle Intercepted Arc A piece of the circle between the two rays