For this case we have that by definition the distance between two points is given by:
[tex]d = \sqrt {(x2-x1) ^ 2 + (y2-y1) ^ 2}[/tex]
Where we have the points are given by:
[tex](x2, y 2) = (- 20, 21)\\(x1, y 1) = (0, 0)[/tex]
Substituting values we have:
[tex]d = \sqrt {(- 20-0) ^ 2 + (21-0) ^ 2}\\d = \sqrt {(- 20) ^ 2 + (21) ^ 2}\\d = \sqrt {400 + 441}\\d = \sqrt {841}\\d = 29[/tex]
Answer:
The distance from the origin to the point (-20, 21) is:
d = 29
