Standard Mathematics Primary 4 Symmetry

Aisha was making a poster for her CCA at her HDB block's common space. She drew the capital letter shown below. How many lines of symmetry does this letter have?

A 0
B 1
C 2
D 4
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Worked Solution

Step 1: A line of symmetry is a fold line where the two halves match exactly when folded. Step 2: Test the VERTICAL line down the middle of H. Folding left onto right, the two vertical strokes match, and the cross-bar matches itself. Vertical = line of symmetry. ✓ Step 3: Test the HORIZONTAL line through the middle of H. Folding top onto bottom, the upper halves of the two vertical strokes match the lower halves, and the cross-bar maps to itself. Horizontal = line of symmetry. ✓ Step 4: Test the two DIAGONAL lines. Folding along either diagonal, the cross-bar of H does not map onto a matching stroke. Diagonals = NOT lines of symmetry. Final answer: H has 2 lines of symmetry (vertical and horizontal). Answer: 2

Correct answer: 2

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