Volume of the Right Pyramid and Cone

Applied Mathematics — Second Secondary

Common mistakes

Comparison aspect	Main idea	Keywords
Mistake	forgetting the factor ⅓ and writing the volume of a pyramid as base area × height. Correct: the volume is one third of the prism with the same base and height	forgettingfactorwritingvolume
Mistake	using the slant height instead of the perpendicular height. Correct: the volume uses the perpendicular height h if only l and r are given first find h	usingslantheightinstead
Mistake	using the area of a circle when the base is a square. Correct: find the actual area of each base	usingareacirclebase
Mistake	squaring the radius by doubling it (writing 2r instead of r²). Correct: r² = r × r then multiply by π and by h	squaringradiusdoublingwriting

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