Describe & Analyze Two-Dimensional ShapesPolygons

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Introduction to Polygons

What are POLYGONS?

Polygons are closed figures made up of straight lines.

Introduction to Polygons

.Polygon Image DefinitionTriangle

Quadrilateral

Pentagon

Introduction to Polygons

.Polygon Image DefinitionHexagon

Octagon

Decagon

Introduction to Polygons

.Polygon Image DefinitionRegular Polygon

Irregular polygon

Congruent Polygons

Introduction to PolygonsPolygon Image Definition

Triangle A three-sided polygon.

Quadrilateral A four-sided polygon.

Pentagon A five-sided polygon.

Introduction to PolygonsPolygon Image Definition

Hexagon A six-sided polygon.

Octagon An eight-sided polygon.

Decagon A ten-sided polygon.

Introduction to PolygonsPolygon Image Definition

Regular Polygon A regular polygon is a polygon which is equiangular (all angles are equal in measure) and equilateral (all sides have the same length).

Irregular polygon

An irregular polygon is any polygon that is not a regular polygon. It can have sides of any length and each interior angle can be any measure

Congruent Polygons

Two polygons that are equal in shape and size.

Introduction to PolygonsConcave Polygons can be cut by a straight lines in more than two points

Convex Polygons can be cut by any straight line in at most two points

Concave Convex

Apple Race

Special TrianglesTriangle Image Definition

Right

Equilateral

Isosceles

Scalene

Special TrianglesTriangle Image Definition

Right A triangle with one right angle.

Equilateral A triangle with three congruent sides.

Isosceles A triangle with two congruent sides and two congruent angles.

Scalene A triangle having no congruent sides.

Special QuadrilateralsTriangle Image Definition

Square

Rectangle

Parallelogram

Trapezoid

Rhombus

Special QuadrilateralsTriangle Image Definition

Square A rectangle with four congruent sides; also, a rhombus with four right angles.

Rectangle A parallelogram with four right angles.

Parallelogram A quadrilateral in which both pairs of opposite sides are parallel.

Trapezoid A quadrilateral with exactly one pair of parallel sides.

Rhombus A parallelogram with four congruent sides.

Quadrilateral Family TreeQuadrilateral

Square Rectangle Parallelogram Rhombus Trapezoid

Square SquareRectangle

Square Rhombus

Tangram Activity