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Module 11 Math
Polygons
Term | Definition |
---|---|
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 |