# 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 angles at the base are equal.

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

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

## 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 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 V= πr²× h

## Volume of a Cuboid Volume= length × width × height
V= l × w × h

Now try the Exercises!