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Edexcel GCSE Maths Spec B – Modular: Booster C © Pearson Education 2010. This document may have been altered from the original. To show the solutions to.

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Presentation on theme: "Edexcel GCSE Maths Spec B – Modular: Booster C © Pearson Education 2010. This document may have been altered from the original. To show the solutions to."— Presentation transcript:

1 Edexcel GCSE Maths Spec B – Modular: Booster C © Pearson Education This document may have been altered from the original. To show the solutions to a question about different kinds of symmetry. Objectives

2 Edexcel GCSE Maths Spec B – Modular: Booster C © Pearson Education This document may have been altered from the original. For each of the following shapes find (a) the order of rotation and (b) the number of different lines of symmetry that shape has. (i) A regular pentagon (ii) An isosceles triangle with only two equal sides

3 Edexcel GCSE Maths Spec B – Modular: Booster C © Pearson Education This document may have been altered from the original. (i) A regular pentagon First, draw the shape.

4 Edexcel GCSE Maths Spec B – Modular: Booster C © Pearson Education This document may have been altered from the original. Next, think about the positions that point A could move to without changing how the shape looks. A (i) A regular pentagon

5 Edexcel GCSE Maths Spec B – Modular: Booster C © Pearson Education This document may have been altered from the original. A 1 Next, think about the positions that point A could move to without changing how the shape looks. (i) A regular pentagon

6 Edexcel GCSE Maths Spec B – Modular: Booster C © Pearson Education This document may have been altered from the original. A 2 Next, think about the positions that point A could move to without changing how the shape looks. (i) A regular pentagon

7 Edexcel GCSE Maths Spec B – Modular: Booster C © Pearson Education This document may have been altered from the original. A 3 Next, think about the positions that point A could move to without changing how the shape looks. (i) A regular pentagon

8 Edexcel GCSE Maths Spec B – Modular: Booster C © Pearson Education This document may have been altered from the original. A 4 Next, think about the positions that point A could move to without changing how the shape looks. (i) A regular pentagon

9 Edexcel GCSE Maths Spec B – Modular: Booster C © Pearson Education This document may have been altered from the original. A 5 Next, think about the positions that point A could move to without changing how the shape looks. (i) A regular pentagon

10 Edexcel GCSE Maths Spec B – Modular: Booster C © Pearson Education This document may have been altered from the original. Once the point A returns to its original position we will find that we know the order of rotational symmetry, which is 5 in this case. A 5 (i) A regular pentagon

11 Edexcel GCSE Maths Spec B – Modular: Booster C © Pearson Education This document may have been altered from the original. Lines of symmetry there are 5. (i) A regular pentagon

12 Edexcel GCSE Maths Spec B – Modular: Booster C © Pearson Education This document may have been altered from the original. (ii) An isosceles triangle with only two equal sides First, draw the shape.

13 Edexcel GCSE Maths Spec B – Modular: Booster C © Pearson Education This document may have been altered from the original. Rotating the shape doesn’t seem to make it look the same (ii) An isosceles triangle with only two equal sides

14 Edexcel GCSE Maths Spec B – Modular: Booster C © Pearson Education This document may have been altered from the original. Rotating the shape doesn’t seem to make it look the same (ii) An isosceles triangle with only two equal sides

15 Edexcel GCSE Maths Spec B – Modular: Booster C © Pearson Education This document may have been altered from the original. Rotating the shape doesn’t seem to make it look the same (ii) An isosceles triangle with only two equal sides

16 Edexcel GCSE Maths Spec B – Modular: Booster C © Pearson Education This document may have been altered from the original. Rotating the shape doesn’t seem to make it look the same (ii) An isosceles triangle with only two equal sides

17 Edexcel GCSE Maths Spec B – Modular: Booster C © Pearson Education This document may have been altered from the original. Rotating the shape doesn’t seem to make it look the same (ii) An isosceles triangle with only two equal sides

18 Edexcel GCSE Maths Spec B – Modular: Booster C © Pearson Education This document may have been altered from the original. Rotating the shape doesn’t seem to make it look the same (ii) An isosceles triangle with only two equal sides

19 Edexcel GCSE Maths Spec B – Modular: Booster C © Pearson Education This document may have been altered from the original. Rotating the shape doesn’t seem to make it look the same (ii) An isosceles triangle with only two equal sides

20 Edexcel GCSE Maths Spec B – Modular: Booster C © Pearson Education This document may have been altered from the original. Rotating the shape doesn’t seem to make it look the same (ii) An isosceles triangle with only two equal sides

21 Edexcel GCSE Maths Spec B – Modular: Booster C © Pearson Education This document may have been altered from the original. Rotating the shape doesn’t seem to make it look the same (ii) An isosceles triangle with only two equal sides

22 Edexcel GCSE Maths Spec B – Modular: Booster C © Pearson Education This document may have been altered from the original. Rotating the shape doesn’t seem to make it look the same (ii) An isosceles triangle with only two equal sides

23 Edexcel GCSE Maths Spec B – Modular: Booster C © Pearson Education This document may have been altered from the original. Until you get back to where you started. There is no rotational symmetry. (ii) An isosceles triangle with only two equal sides

24 Edexcel GCSE Maths Spec B – Modular: Booster C © Pearson Education This document may have been altered from the original. There is one line of symmetry. (ii) An isosceles triangle with only two equal sides

25 Edexcel GCSE Maths Spec B – Modular: Booster C © Pearson Education This document may have been altered from the original. Firstly draw a sketch of the shape in question. Summary Try tracing the shape and rotating your drawing to see how many time it fits onto itself in one turn. Draw the lines of symmetry, taking care not to count the same one twice.


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