• Regular

• Irregular

• Congruent

• Vertices

11.1 Polygons

• equilateral

• scalene

• equilateral

11.3 Triangles

• Parallelogram

• rectangle

• square

• rhombus

• trapezoid

11.3 Quadrilaterals

• right

• acute

• obtuse

Regular polygons are all equal

*Congruent

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11.1 Polygons

Irregular Polygons = not all sides are the same

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11.1 Polygons

Polygon Names based on number of sides

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11.1 Polygons

11.2 Triangles

• three-sided polygons

11.2 Triangle names by side

11.2 Triangle names by angle

11.3 Quadrilaterals

• any four-sided polygon

• Key words:

  • parallel

  • perpendicular

  • congruent

11.3 Quadrilateral: Parallelogram

• 2 sides are parallel

• some have right angles

• some have equal sides

11.3 Quadrilateral: Trapezoid, Trapezium, or Kite

• 1 or no side is parallel

• may only have 1 right angle