## Elementary Geometry for College Students (7th Edition)

a$\sqrt 2$ units
Given: points (a,0)and (0,a) The distance between the given points $\sqrt (0-a)^{2}$ + (a-0)^{2} = $\sqrt a^{2} + a^{2}$ =$\sqrt 2a^{2}$ =a$\sqrt 2$ units