# Shapes

Shapes come in all forms and sizes. Have a look at the shapes below.

## Circle |
## Diamond |
## Rectangle |
## Cylinder |

## Hexagon |
## Oval |
## Traingle |
## Square |

# 2D Shapes

2D (dimensions) shapes are flat they do not have any volume.

The following are examples of 2D shapes:

- Triangle
- Rectangle
- Circle

# Triangles

Triangles have 3 sides and the total angles of a triangle add up to 180 degrees. There are different types of triangles.

## Isosceles |
The sides 1 and 2 are equal and the |

## Equilateral |
The sides 1,2 and 3 are equal and all three |

## Right-angled |
A right angled triangle has a 90 degree angle. |

# Quadrilaterals

Quadrilateral shapes have 4 sides.

## Square |
## Rectangle |
## Parallelogram |

# Area of a Triangle

**Perpendicular means upright or vertical.**

Area= ½ × base × perpendicular height

A=½ × b ×h

# Area of a Rectangle

Area= length × width

A= l × w

# Area of a Circle

Area= pi × radius x radius

A = π × r x r

or A = π × r²

The value for π is 3.14

# 3D Shapes

A 3D shape has width, depth and height.

## Cube |
## Cone |
## Cylinder |

## Volume of a Cylinder

Volume= (pi × radius²)×height

V= πr²× h

## Volume of a Cuboid

Volume= length × width × height

V= l × w × h