5. The diagram shows a coordinate plane, with three points A,B and C, plotted.
(i) Copy the diagram and use the given points and any additional necessary ones to create a fi gure that is symmetric about the line l (the line l is its axis of symmetry).
(ii) What are the coordinates of the additional points? 5 C
y Line l 10 A B
0 6. (i)
Given the following lines of symmetry, a, b, c and d , construct a symmetric fi gure through each one in the plane and record its coordinates.
(ii) Explain how you know the fi gures are symmetrical.
a
5 y
5 4 3 2 1
–5 –4 –3 –2 –1 0 c
–1 –2 –3 –4 –5
10
x
b 1 2 3 4 5 d x
Revision questions
1A Core skills 1. Use the number line below to solve the following. (i) 1 + 8 (ii) 3 + 4 (iii) 7 + 5 (iv) 17 – 9 (v) 13 – 8 (vi) 18 – 7 (vii) 14 – 8 (viii) 15 – 8
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
2. Use the number line below to solve the following. (i) 1 + 4 (ii) 4 – 6 (iii) 0 – 5 (iv) –1 –3 (v) 5 – 6 (vi) 3 – 7 (vii) 5 – 9 (viii) 0 – 0
–6 –5 –4 –3 –2 –1 0 1 2 3 4 5 6
Section A Introducing concepts and building skills