Polygons: Polygons Exploring
What is a polygon?: What is a polygon? Polygons are many-sided figures, with sides that are line segments. Polygons are named according to the number of sides and angles they have. Can be “regular” – all sides and all angles are equal to each other
Isosceles Triangles: Isosceles Triangles Two sides of equal length Three acute angles Sum of angles = 180°
Equilateral Triangles: Equilateral Triangles All sides equal length Three acute angles Sum of angles = 180° Is a regular polygon
Scalene Triangles: Scalene Triangles No sides are equal No angles are equal May have obtuse angle Sum of angles = 180 °
Rectangles: Rectangles Opposite sides are parallel Opposite side are equal in length Each angle equals 90° Sum of angles = 360°
Squares: Squares All sides equal All angles equal and are 90 ° each Sum of angles = 360 ° Is a regular polygon
Trapezoids: Trapezoids Two sides are parallel Has obtuse and acute angles Sometimes has a right angle Sum of angles = 360 °
Rhombuses (rhombi): Rhombuses (rhombi) All four sides of equal length Opposite angles are equal – 2 acute angles, 2 obtuse angles Sum of angles = 360 ° Regular polygon
Parallelograms: Parallelograms Opposite sides parallel Opposite sides equal in length Opposite angles equal Sum of angles = 360 °
Pentagons: Pentagons 5 sides Sum of angles = 540 ° Regular polygon
Hexagons: Hexagons 6 sides Sum of angles = 720 ° Can be regular polygon
Octagons: Octagons 8 sides Sum of angles = 1080 ° Can be regular polygon
Decagons: Decagons 10 sides Sum of angles = 1440° Can be regular polygon