31.2 Drawing Complex Numbers on a Plane: the Complex Plane
Point 3 of 4
31.2.3 Modulus: How Long the Arrow Is
Core idea
Picture this: measure the length of the arrow and you have the modulus, |a+bi|=√(a²+b²), which can never be negative
Module goal. Borrowing the coordinate plane from the last stage, we give every complex number its own "address," turning it from a symbol into a visible point and arrow
eastmath.com · 31.2 Drawing Complex Numbers on a Plane: the Complex Plane · 31.2.3 Modulus: How Long the Arrow Is