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area of circle
A = πr²
circumference of circle
C = 2πr
volume of cone
V = (1/3)πr²h
volume of sphere
V = (4/3)πr³
volume of pyramid
V = (1/3) * base area * height
volume of frustrum.
V = vol. of bigger cone - vol. of smaller cone
curved surface of cone
A = πrl (l is the slant height of cone)
total surface area of cone
A = πrl + πr²
surface area of sphere
A = 4πr²
arc length
L = θ/360 * πd
area of sector
A = θ/360 * πr²
area of ABC triangle
A = (1/2)abSinC
area of segment
area of sector - triangle
Note
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