two-dimensional shapes
DESCRIPTION
Presentation about two-dimensional shapes.TRANSCRIPT
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