GCSE Maths Symbols, Equations & Formulae

Question	Answer
\[\pi\]	3.141592
Circumference of a Circle	C = 2\(\pi\)r
Perimeter of a Semi-circle	\(\pi\) x r + 2 x r
Perimeter of a Quarter Circle	\(\frac{1}{2}\) x \(\pi\) x r + 2 x r
Area of a Circle	\(\pi\)\(r^2\)
Area of a Semi-circle	\(\frac{1}{2}\) x \(\pi\) x \(r^2\)
Area of a Quarter Circle	\(\frac{1}{4}\)\(\pi\)\(r^2\)
Area of a Rectangle	base x height
Area of a Triangle	\(\frac{1}{2}\) x base x height
Area of a Parallelogram	base x height
Area of a Trapezium	\(\frac{1}{2}\)(a + b)h
Area of a Sphere	4\(\pi\)\(r^2\)
\[a^2\]	a x a
\[b^3\]	b x b x b
\[c^4\]	c x c x c x c
\[4d^2\]	4 x d x d
\[2e^3\]	2 x e x e x e
\[4y^2 - y\] when y = 3, y = ?	(4 x y x y) - y = (4 x 3 x 3) - 3 = 33
Equation of a Straight Line	y = mx + c
Quadratic Equations	Image: quadratic_equation.JPG (image/JPG)

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