By: Student Sample 1

 Acute angles  Right angles  Obtuse angles  Congruent angles  Complementary angles  Parallel lines  Intersecting lines (not perpendicular)  Perpendicular lines  Isosceles triangles  Obtuse triangle  Parallelograms  Rectangles  Squares  Trapezoids  Polygons with more than 4 sides (pentagons, hexagons, etc.)  A symmetric polygon  A non-symmetric polygon  A concave polygon  A polygon composed by two or more smaller polygons 2

An Acute Angle is an angle smaller than 90 degrees. 3

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A Right Angle is an angle that is 90 degrees. 5

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An Obtuse Angle is an angle that is more than 90 degrees. 7

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Congruent Angles are angles two angles that have the same angle measurements in degrees. 9

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Complementary Angles are two angles that add up to equal 90 degrees. 11

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Parallel Lines are lines are always the same distance apart and will never meet. 13

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Intersecting Lines are lines that have one and only one point in common. 15

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Perpendicular Lines are two lines that meet at a 90 degree angle. 17

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An Isosceles triangle is a triangle with two congruent sides. 19

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An Obtuse Triangle has one angle that is more than 90 degrees. 21

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A Parallelogram is a quadrilateral with both pairs of opposite sides parallel and equal in length. 23

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A Trapezoid is a quadrilateral which has one pair of parallel sides. 25

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A square has four equal sides and all the eternal angles equal 90 degrees. 27

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A Rectangle is a four sided polygon that all eternal angles are 90 degrees. 29

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A Nonagon is a polygon with 9 sides. 31

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A Heptagon is a 7 sided polygon with all eternal angles equaling 900 degrees. 33

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A Symmetrical Polygon is a polygon that can be dissected into two congruent parts that every point on one side of the bisection line will have a reflective point on the other side of the bisection line. 35

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A non-symmetrical polygon is a polygon that can not be dissected into two congruent parts. 37

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A Concave Polygon has at least one angle that measures more than 180 degrees. 39

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This is a polygon that is made up of two smaller polygons. 41

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