At the Malay Cultural Centre, Nadia is copying a batik pattern onto grid paper. The pattern has a vertical line of symmetry drawn down the middle. On the LEFT side of the line, 5 squares are shaded. How many squares must Nadia shade on the RIGHT side of the line to complete the symmetric pattern?
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Worked Solution
Step 1: Recall the rule for a line of symmetry.
Every point on one side has a matching point at the same distance on the other side.
Step 2: Apply the rule to the pattern.
Each of the 5 shaded squares on the LEFT side must have exactly 1 matching shaded square on the RIGHT side, at the same distance from the centre line.
Step 3: Count the squares needed on the right.
5 squares on the left → 5 squares needed on the right.
Final answer: 5.
Answer: 5
Correct answer: 5
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