During National Day celebrations, Siti is cutting out decorations for her class display. She has four shapes: • A rectangle • A scalene triangle • A parallelogram • An irregular hexagon Which shape has at least one line of symmetry?
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Worked Solution
Step 1: Check the rectangle.
A vertical fold matches left and right halves exactly. A horizontal fold matches top and bottom halves exactly.
The rectangle has 2 lines of symmetry.
Step 2: Check the scalene triangle.
All three sides are different lengths, so no fold produces matching halves.
No line of symmetry.
Step 3: Check the parallelogram.
Opposite sides are equal, but folding along any diagonal or mid-line does not produce matching halves.
No line of symmetry.
Step 4: Check the irregular hexagon.
Sides and angles are unequal, so no line of symmetry.
Final answer: Rectangle.
Answer: Rectangle
Correct answer: Rectangle
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