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Question
Point A (2, -4) is reflected in origin as A’. Point B (- 3, 2) is reflected on X-axis as B’.
(i) Write the co-ordinates of A’.
(ii) Write the co-ordinates of B’.
(iii) Calculate the distance A’B’.
Give your answer correct to 1 decimal place, (do not consult tables).
Solution
(i) A' → (-2, 4).
(ii) B' → (-3, -2).
(iii) Distance A'B'
= `sqrt((-3 + 2)^2 + (-2 -4)^2)`
= `sqrt(1 + 36)`
= `sqrt(37)`
= 6.1
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