www mathsrevision com S 4 Symmetry Line Symmetry

www. mathsrevision. com S 4 Symmetry Line Symmetry Rotational (Order) Symmetry Creating Rotational Symmetry

Starter Questions www. mathsrevision. com S 4 Q 1. Calculate Q 2. Q 3. If 1 bar of chocolate costs 65 p. How much will 1000 bars cost. Give your answer in £’s. Round to 1 decimal place Q 4. Covert to 24 hrs clock

www. mathsrevision. com S 4 Line Symmetry Learning Intention 1. To revise line symmetry. Success Criteria 1. Understand the term line symmetry. 2. Complete Drawings given the line of symmetry.

www. mathsrevision. com S 4 Line Symmetry A line symmetry occurs in a shape if, when the shape is folded over the line the two pieces either side of the line, are exactly the same.

www. mathsrevision. com S 4 Line Symmetry The Square

www. mathsrevision. com S 4 Line Symmetry The rectangle

www. mathsrevision. com S 4 Line Symmetry The Kite

www. mathsrevision. com S 4 Line Symmetry The Rhombus

www. mathsrevision. com S 4 Line Symmetry The Parallelogram No lines of symmetry !

www. mathsrevision. com S 4 Line Symmetry The Equilateral Triangle

www. mathsrevision. com S 4 Line Symmetry The Trapezium 1

www. mathsrevision. com S 4 Line Symmetry The Trapezium 2 No lines of symmetry !

www. mathsrevision. com S 4 Line Symmetry The Hexagonal

S 4 Line Symmetry www. mathsrevision. com Example : Complete the rest of the shape given the line of symmetry.

Line Symmetry www. mathsrevision. com S 4 Now try MIA Ex 1 Ch 3 (page 33) 05 -Nov-20 Created by Mr. Lafferty Maths Dept.

Starter Questions www. mathsrevision. com S 4 Q 1. Round the following to the first decimal place. Q 2. What fraction is the green area. What fraction is the grey area. Q 3. A pencil costs 22 p. How much does a 1000 cost. Put your answer in £’s. (a) 153. 37 (b) 261. 55

www. mathsrevision. com S 4 Rotational Symmetry Learning Intention 1. To explain rotational symmetry for a shape. Success Criteria 1. Understand the terms rotational symmetry.

Rotational Symmetry www. mathsrevision. com S 4 1. Draw this shape into your jotter. 2. Use the tracing paper to make a copy of this shape. 3. Turn the tracing paper through 180 degrees about the dot. This new shape has HALF - TURN symmetry This dot is called the centre of symmetry

www. mathsrevision. com S 4 Rotation Symmetry Half Turn All these shapes have order 2

www. mathsrevision. com S 4 Rotation Symmetry Order The order of symmetry is the number of times a shape looks the same in one complete turn. Has order 2 Has order 3 Has order 4

Rotational Symmetry www. mathsrevision. com S 4 Now try MIA Ex 2 Ch 3 (page 36) 05 -Nov-20 Created by Mr. Lafferty Maths Dept.

Starter Questions www. mathsrevision. com S 4 Q 1. Calculate Q 2. What is the time difference between 8. 15 am and 1: 00 pm P=20 cm Q 3. A=25 cm Q 4. Find the perimeter and area of the square. Q 5. Find the order of rotational symmetry 6 5 for the shape opposite. 1 4 3 2 2

www. mathsrevision. com S 4 Creating Half-Turn Symmetry Learning Intention 1. To explain how we can create half-turn symmetry for a shape. Success Criteria 1. Understand the terms half-turn symmetry. 2. Draw the other half of a shape such that it has half -turn symmetry.

Creating Half-Turn Symmetry S 4 www. mathsrevision. com Task 1 Draw the complete shape you get after it has been rotated through 180 degrees about the point. Task 2 Do the same for this shape

www. mathsrevision. com S 4 Creating Half-Turn Symmetry Task 3 Do the same for this shape If you find it difficult to work out the new shape 1. Try tracing the shape first 2. Then rotate tracing paper 180 deg about the point.

Creating Half-Turn Symmetry www. mathsrevision. com S 4 Now try MIA Ex 3 Ch 3 (page 38) 05 -Nov-20 Created by Mr. Lafferty Maths Dept.