# MTH2: RELATIONS AND MAPPING

##### This unit is about relations and mapping,Relation is an association between two objects,Mapping is an association between two sets A and B such that each element of A is associated with a unique element of B. So, "there must be an answer, and this answer should be unique". Polygons and Polythedra plus property.

RELATIONS AND  MAPPING

May also be called a defining condition.

1. Older than; Ismail is older than Arusha.
2. is bigger than . babara is bigger than me.
3. is less than 2 is less than 90
4. is younger than: hellena is younger than peace.

1. Peter and Jesca

Peter is a brother to Jesca.

1. Number 18 and 9

18 is more than 9

Establish relation between members of family;

Jane , Jude , Jonah

Representing Relation

Use arrows on papygram to represent.

Example

Use an arrow diagram to show the relation factor of

1. Percy peter Lilyan , Mark and peace are children in a home . Show the relations is a brother to an a papy gram.

Exercise

Use he relevant diagram to represent the relations below for the given sets.

In total , there are eleven nets which can be got out of a cuboid

Example 2

Sketch the nets for

1. Hexagonal prism
• Draw a hexagon using a circle of radius 1.5cm. Use it to draw the nets of a hexogen with length 5cm. (With open ends closeds)

POLYGONS AND POLYTHEDRA

NETS

Nets are sets of squares, triangles etc which can . Be folded to from polyhedral, cylinders with cones.

A polyhedral is a solid with plane faces

e.g A card board box can be cut as shown below.

diagrams

Other nets which can be got from a cube

Property

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YOU