1. DO NOT MIX UP THESE OBJECTIVES
To be able to find an unknown quantity in a given ratio
To be able to share a quantity in a given ratio
RATIO REVISION WORKSHEET for Monday 9th April (day we’re back)

2. Can you define this word in a mathematical context?
Mathematics - '4 pics 1 word' U A P R A L D L I S E Q T R
Can you define this word in a mathematical context?

3. Can you define this word in a mathematical context?
Mathematics - '4 pics 1 word' R E T G P A C N B P O O
Can you define this word in a mathematical context?

4. Can you define this word in a mathematical context?
Mathematics - '4 pics 1 word' N P O A P X O S E P G H
Can you define this word in a mathematical context?

5. Can you define this word in a mathematical context?
Mathematics - '4 pics 1 word' O T H P G N N N A E S A
Can you define this word in a mathematical context?

6. Can you define this word in a mathematical context?
Mathematics - '4 pics 1 word' G P R E R U A L P G J I
Can you define this word in a mathematical context?

7. Can you define this word in a mathematical context?
Mathematics - '4 pics 1 word' G P R E R U A L P R J I
Can you define this word in a mathematical context?

8. Can you define this word in a mathematical context?
Mathematics - '4 pics 1 word' I X T O G N R R I T E H
Can you define this word in a mathematical context?

9. Can you define this word in a mathematical context?
Mathematics - '4 pics 1 word'
= 360° I X T O G N R R E T E H
Can you define this word in a mathematical context?

10. Can you define this word in a mathematical context?
Mathematics - '4 pics 1 word' J O K N P D R M I S U G
Can you define this word in a mathematical context?

11. Can you define this word in a mathematical context?
Mathematics - '4 pics 1 word' E I E E D S O E R G E A
Can you define this word in a mathematical context?

12. Polygons A polygon is a shape made from only straight edges
Polygons are named on the basis of how many sides they have
You need to learn the following names:
Some of the names get silly…
Sides
Polygon Name 12
Dodecagon
5 sides
4 sides 13
Triskaidecagon
3 sides 14
Tetrakaidecagon
Triangle
Quadrilateral
Pentagon 19
Enneadecagon 20
Icosagon
100000
Megagon
8 sides
10100
Googolgon
6 sides
7 sides
Luckily you don’t have to learn these!
Hexagon
Heptagon
Octagon

13. Regular and irregular polygons
A regular polygon is one with all sides the same and angles the same
To describe all other regular polygons, just put the word ‘regular’ in front of their name
Because you often use regular triangles and quadrilaterals, they have special names:
Equilateral Triangle
Regular pentagon
Regular hexagon
Square
An irregular polygon has sides and angles that vary
Irregular heptagon
Irregular octagon

14. Name this Shape
Regular heptagon

15. Name this Shape
Irregular pentagon

16. Name this Shape
Irregular hexagon

17. Why is this polygon NOT regular (irregular)?
Sides are equal but angles aren’t

18. Why is this polygon NOT regular (irregular)?
Only 2 sides and 2 angles equal

19. Why is this polygon NOT regular (irregular)?
Angles are equal but sides aren’t

20. Angles in Polygons
The angles inside the shape at each corner are called interior angles
The angle between pairs of adjacent sides are called exterior angles
Can you spot the connection between interior and exterior angles?
They add up to 180o at any corner
Interior angle
Exterior angle +
In this topic, we will look at:
the sum of the exterior angles of any polygon
the sum of the interior angles of any polygon
the exterior angle of a regular polygon
the interior angle of a regular polygon

21. Introducing Polygons By the end of the lesson, we will be able to:
identify different types of polygons
distinguish between regular and irregular polygons
distinguish between interior and exterior angles