Department of Mathematics and Informatics Faculty of Science

University of Kragujevac

TWO-DIMENSIONAL SHAPES

11/03/2014

Professor: Anica Glođović

Students:Jovanović Anđelija 19/2014Joković Jovana 21/2014

GEOMETRY

• Geo- “earth’’• Metron- “measurement’’

-branch of matematics-Euclid- father of geometry

“There’s no royal road to geometry.’’ – Euclid, 300 BC

Geometry

SHAPES• 1 dimensional (a line)

• 2 dimensional (a plane)

• 3 dimensional (any object in the real world)

2D SHAPES DEFINITION• '2D' stands for 2-dimensional.• A 2D shape is any shape that has two

dimensions: •  width •  height

Division of shapes• Generally composed of straight line segments• Curved

Polygons-shapes with sides made of

straight lines -triangle, square, hexagon

Quadrilaterals-shape with four straight

sides.-square, rhombus,

rectangle, trapezium

Triangle -polygon with three angles

and three sides

ab

cA B

C

angle

vertex

side

Rectangle

-any quadrilateral with four right

angles

angle

side

D

A

C

B

Square

- quadrilateral with four right angles and equal sides

A B

CD

angle

Rhombus

-quadrilateral with four equal sides

A B

CD

Trapezium

- quadrilater with one pair of parallel sides

Pentagon

- shape with five straight sides and five angles

Hexagon- shape with 6 straight

sides and 6 angles

Circle

-a round flat two-dimensional shape

Two dimensional shapes

Usage

• the basis for development of three-dimensional shapes.

• the basis for every draft. • Architecture• Children’s drawings

Two dimensional shapes

Usage

References