Standard Mathematics Primary 4 Symmetry

The figure shows HALF of a symmetric design. The line of symmetry runs vertically along the LEFT edge of the figure. The half-design is made up of a 6 cm by 8 cm rectangle with a 4 cm by 4 cm square cut out from one corner. Find the area of the COMPLETE symmetric design.

A 32 cm²
B 64 cm²
C 96 cm²
D 48 cm²
Show Worked Solution

Worked Solution

Step 1: Find the area of the half-design. Half = (6 × 8) − (4 × 4) = 48 − 16 = 32 cm². Step 2: Reflect the half across the line of symmetry to complete the design. The complete design is two copies of the half joined along the symmetry line. Step 3: Total area of the complete design. Total = 2 × 32 = 64 cm². Answer: 64 cm²

Correct answer: 64 cm²

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