SHAPES

2D shapes can be defined as the plane figures that can be drawn on a flat (or plane) surface or a piece of paper. All the 2D shapes have various parameters such areas and perimeter. Some of the 2D shapes contain sides and corners, whereas some have curved boundaries.

2d Shapes

  • It is a shape surrounded by three or more straight lines in a plane and sometimes with a closed curve
  • These shapes have no depth or height.
  • These shapes have only two dimensions, say length and breadth, whereas curved shapes such as circle and ellipse have radii.
  • Area, perimeter can be found for these shapes.
  • Examples: Circle, Triangle, Quadrilaterals, Polygons, etc.

 

 

2D-shapes and its properties

 

 2D- shape name

No. of sides

Sum of angles

Equal angles

Equal sides

 

Triangle

3

180o

It can have no, 2 or 3 equal angles

It can have 0,2 or 3 equal sides

 Square

4

360o

Can have Four equal angles (90°)

It can have Four equal sides

Rectangle

4

360o

Can have Four equal angles (90°)

2 sets of 2 equal sides

Circle

0

The total angle of a circle is equal to 360 degrees

Constant diameter and radius

Pentagon

5

540o

5 angles (can be equal or unequal)

5 sides (can be equal or unequal)

 

Hexagon

6

720o

6 angles (can be equal or unequal)

6 sides (can be equal or unequal)

Heptagon

7

900o

7 angles (can be equal or unequal)

7 sides (can be equal or unequal)

Octagon

8

1089o

8 angles (can be equal or unequal)

8 sides (can be equal or unequal)

Parallelogram

4

360o

2 sets of 2 equal angles

2 sets of 2 equal sides

Rhombus

4

360o

2 sets of 2 equal angles

All sides the same length

Trapezium

4

360o

Can have pairs of equal

angles

At least 2 parallel sides

Circle

I am a circle, like a ball.

Watch me bend, watch me bend,

 

I am a curve line that never ends.Round and round it never stops.