Complex numbers

Lab: modulus, distance and argument

Drag the points to connect coordinates, lengths and directions. Distinguish a circle from a disk and exact formulas from approximations.

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Coordinates from −20 to 20: integers, decimals up to three places or fractions such as 1/3 (numerator and denominator up to six digits). Radius from 0 to 20. Data updates immediately; you may also press Calculate.

Problem statement