Mathematics for IGCSE & O level - Mensuration (Section 11 - No. 9)
How is the slant height of a cone related to its radius and height?
Slant height = radius + height
Slant height = √(radius² + height²)
Slant height = √(radius² - height²)
Slant height = radius * height
Explanation
The slant height, radius, and height form a right-angled triangle. Using Pythagoras theorem, slant height = √(radius² + height²).
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