Math Formulas (7th grade+ )

Guess what the name of the formula or what it is used for. For shapes, please write (Volume, Area, Perimeter, Surface Area...) of a (Shape name). For example, if the formula is a cubed, then your answer will be: Volume of a Cube. For other formulas, just write the name of the formula. Unnecessary parentheses may be added to avoid confusion. Good Luck! (I highly recommend not the cheat)

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Last updated: November 9, 2017

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First submitted	October 18, 2017
Times taken	85
Average score	33.3%
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Formula	Answer
x=(-b±√(b^2-4ac))/2a	Quadratic Formula
Side Squared	Area of a Square
bh/2	Area of a Triangle
2πr	Circumference of a Circle
πr^2	Area of a Circle
h(πr^2)	Volume of a Cylinder
πab	Area of an Ellipse
h(a+b/2)	Area of a Trapezoid

Formula	Answer
1/4√5(5+2√5)a^2	Area of a Regular Pentagon
(3√3/2)a^2h	Volume of a Regular Hexagonal Prism
(4/3)(π)(a)(b)(c)	Volume of an Ellipsoid
(4/3)(π)(r^3)	Volume of a Sphere
2(1+√2)a^2	Area of a Regular Octagon
a^2+b^2=c^2	Pythagorean Theorem
((πr^2) x h)/3	Volume of a Cone