Mensurationmedium · Past Paper
A square-based pyramid has a base perimeter of 40 cm and a vertical height of 12 cm. Find its slant height.
A13 cm
B15 cm
C17 cm
D20 cm
✓ Correct Answer: A — 13 cm
Base side a = 40/4 = 10. l = sqrt(h² + (a/2)²) = sqrt(12² + 5²) = 13 cm.
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