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)

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?

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?

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?

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?

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?

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?

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?

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?

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?

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?

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

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

Name this Shape Regular heptagon

Name this Shape Irregular pentagon

Name this Shape Irregular hexagon

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

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

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

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

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