Quadrilateral Polygons

Home , Equilateral triangle, Isosceles triangle, Parallelogram, Quadrilateral, Rhombus, Right triangle

A quadrilateral shape has four sides and four vertices or angles.

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.

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.

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.

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.

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.

POLYGONS TRIANGLES

A triangle has three sides and three angles.

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.

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.

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.

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.

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.

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.

POLYGONS Pentagon

A pentagon has five sides. A regular pentagon has five equal sides and five equal angles.

POLYGONS Hexagon

A hexagon has six sides. A regular hexagon has six equal sides and six equal angles.

POLYGONS Octagon

An octagon has eight sides. A regular octagon has eight equal sides and eight equal angles.

CURVED SHAPES

A curved shape usually has one side, no other lines, no vertices, and no angles.

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.

An oval has one line. It has no edges, no vertices, no angles. It is egg-shaped.

A crescent is made by two intersecting circles.