What are the top 5 formulas in math?

Here’s a list of the most important formulas in each section.

Plane Geometry

Area of Triangle: area = (1/2) (base) (height)
Pythagorean Theorem: a²+b²=c²
Area of Rectangle: area = length x width.
Area of Parallelogram: area = base x height.
Area of Circle: π * r²
Circumference of Circle: circumference = 2π * r.

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