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# Module 11 Math

### Polygons

TermDefinition
Acute triangle Triangle where all angles are acute (less than 90 degrees)
Decagon Polygon with ten sides and ten angles
Equilateral triangle Triangle where all 3 sides and all 3 angles are the same size
Heptagon Polygon with seven sides and seven angles
Hexagon Polygon with six sides and six angles
Isosceles triangle Triangle where 2 sides and 2 angles are the same size
Nonagon Polygon with nine sides and nine angles
Obtuse triangle Triangle where one angle is obtuse (greater than 90 degrees). The other two are acute
Octagon Polygon with eight sides and eight angles
Parallelogram A quadrilateral where opposite sides are parallel and congruent
Pentagon Polygon with five sides and five angles
Quadrilateral a polygon with four sides and 4 angles
Rectangle A quadrilateral that is a parallelogram and has four right angles and sides that are perpendicular
Regular Polygon Polygon with all sides and all angles congruent
Rhombus a quadrilateral that is a parallelogram and has 4 congruent sides
Right triangle Triangle where one angle is a right angle (90 degrees). The other two are acute.
Scalene triangle Triangle where no sides and no angles are the same size
Square a quadrilateral that is a parallelogram a rectangle and a rhombus
Trapezoid A quadrilateral with only one pair of parallel sides
Triangle Polygon with three sides and three angles
Created by: Shebro