Circles circumferences areas

參考數据與工程 information about circles circumferences areas 用于 mathematics applications.

circlescircumferencesareas

Overview

Engineering reference data for Circles Circumferences Areas in mathematics.

$x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}$

Roots of ax² + bx + c = 0.

$c^2 = a^2 + b^2$

Right triangle relationship.

$A = \pi r^2$

Area of a circle.

$\log_b(x) = \frac{\ln(x)}{\ln(b)}$

Change of base formula.

Symbol	Description	Unit
$\pi$	Pi	3.14159...
$e$	Euler's number	2.71828...