POLYGONS QUADRILATERAL A quadrilateral shape has four sides and four vertices or angles. © 2007abcteach.com POLYGONS– QUADRILATERAL Rhombus A quadrilateral has four sides and four vertices. vertices. sides and four has four A quadrilateral A rhombus has four equal sides. A rhombus is a kind of parallelogram. Because all the sides are equal length, the rhombus has parallel sides. A square is a rhombus. © 2007abcteach.com POLYGONS– QUADRILATERAL Rectangle A quadrilateral has four sides and four vertices. vertices. sides and four has four A quadrilateral A rectangle has four equal angles. All of the angles are right angles. A rectangle is a kind of parallelogram. It has two pairs of parallel sides. © 2007abcteach.com POLYGONS– QUADRILATERAL Square A quadrilateral has four sides and four vertices. vertices. sides and four has four A quadrilateral A square is a special kind of rectangle that is also a rhombus. A square has four equal angles and four equal sides. A square is a kind of parallelogram. It has parallel sides. © 2007abcteach.com POLYGONS– QUADRILATERAL Parallelogram A quadrilateral has four sides and four vertices. vertices. sides and four has four A quadrilateral A parallelogram has two pairs of opposite, parallel sides. A square is a parallelogram. A rectangle is a parallelogram. A rhombus is a parallelogram. © 2007abcteach.com POLYGONS– QUADRILATERAL Isosceles Trapezoid A quadrilateral has four sides and four vertices. vertices. sides and four has four A quadrilateral Two of the opposite sides of an isosceles trapezoid are parallel. Two ends of each parallel side have equal angles and equal length. © 2007abcteach.com POLYGONS TRIANGLES A triangle has three sides and three angles. © 2007abcteach.com POLYGONS—TRIANGLES Equilateral Triangle A triangle has three sides and three vertices. A triangle has three sides and vertices. An equilateral triangle has three equal sides. It also has three equal angles. © 2007abcteach.com POLYGONS—TRIANGLES Isoceles Triangle A triangle has three sides and three vertices. A triangle has three sides and vertices. An isosceles triangle has two equal sides. It also has two equal angles. © 2007abcteach.com POLYGONS—TRIANGLES Scalene Triangle A triangle has three sides and three vertices. A triangle has three sides and vertices. A scalene triangle has three inequal sides. It also has three inequal angles. © 2007abcteach.com POLYGONS—TRIANGLES Right Triangle A triangle has three sides and three vertices. A triangle has three sides and vertices. A right triangle has one 90° angle. © 2007abcteach.com POLYGONS—TRIANGLES Obtuse Triangle A triangle has three sides and three vertices. A triangle has three sides and vertices. An obtuse triangle has one angle 90° or larger. © 2007abcteach.com POLYGONS—TRIANGLES Acute Triangle A triangle has three sides and three vertices. A triangle has three sides and vertices. An acute triangle has all of its angles 90° or smaller. © 2007abcteach.com POLYGONS Pentagon A pentagon has five sides. A regular pentagon has five equal sides and five equal angles. © 2007abcteach.com POLYGONS Hexagon A hexagon has six sides. A regular hexagon has six equal sides and six equal angles. © 2007abcteach.com POLYGONS Octagon An octagon has eight sides. A regular octagon has eight equal sides and eight equal angles. © 2007abcteach.com CURVED SHAPES A curved shape usually has one side, no other lines, no vertices, and no angles. © 2007abcteach.com CURVED SHAPES Circle A curved shape has no angles. A curved A circle has one line. It has no edges, no vertices, no angles. All the parts of the circle line are the same distance from the center. © 2007abcteach.com CURVED SHAPES Oval A curved shape has no angles. A curved An oval has one line. It has no edges, no vertices, no angles. It is egg-shaped. © 2007abcteach.com CURVED SHAPES Crescent A curved shape has no angles. A curved A crescent is made by two intersecting circles. © 2007abcteach.com .