Question

Find the distance between the origin and the points $(12,-5)$.

Answer 1

Distance between origin and $(x,y)=\sqrt{x^2+y^2}$
Here, $(x,y)=(12,-5)$
$d=\sqrt{{12}^2+(-5{)}^2}=\sqrt{144+25}=\sqrt{169}$
$\therefore d=13$ units.