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Geometry Formulas

Shape	Area	Perimeter
Square	a²	4a
Rectangle	a × b	2(a+b)
Triangle	½ × b × h	a + b + c
Circle	πr²	2πr
Trapezoid	½(a+b) × h	a+b+c+d
Parallelogram	b × h	2(a+b)

Volume Formulas

Shape	Volume	Surface Area
Cube	a³	6a²
Sphere	4/3 πr³	4πr²
Cylinder	πr²h	2πr(r+h)
Cone	1/3 πr²h	πr(r+l)