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Module 11 Vocabulary

TermDefinition
Triangle Polygon with three sides and three angles
Quadrilateral Polygon with four sides and four angles
Pentagon Polygon with five sides and five angles
Hexagon Polygon with six sides and six angles
Heptagon Polygon with seven sides and seven angles
Octagon Polygon with eight sides and eight angles
Nonagon Polygon with nine sides and nine angles
Decagon Polygon with ten sides and ten angles
Equilateral triangle Triangle with three equal sides and 3 acute 60 degree angles
Isosceles triangle Triangle with two congruent sides, with all acute, one obtuse, or one right angle
Scalene triangle Triangle with no congruent sides, with all acute, one obtuse, or one right angle
Acute triangle Triangle where all angles are acute (less than 90 degrees)
Obtuse triangle Triangle where one angle is obtuse (greater than 90 degrees). The other two are acute.
Right triangle Triangle where one angle is a right angle (90 degrees). The other two are acute.
Parallelogram A quadrilateral where opposite sides are parallel and congruent.
Rectangle A quadrilateral that is a parallelogram and has four right angles
Rhombus A quadrilateral that is a parallelogram and has four congruent sides.
Square A quadrilateral that is a parallelogram and has four right angles (rectangle) and four congruent sides (rhombus).
Trapezoid A quadrilateral with only one pair of parallel sides.
Regular Polygon Polygon with all sides and all angles congruent
Created by: hcooper