Question

Which expression represents the distance between point (0, a) and point (a, 0) on a coordinate grid?
StartRoot 2 a squared EndRoot
StartRoot a Superscript 4 Baseline EndRoot
StartRoot 2 a Superscript 4 Baseline EndRoot
0

Answer 1

Distance = sqrt[(a-0)^2 + (0-a)^2] = sqrt[a^2 + a^2] = sqrt(2a^2) = |a|√2.
So the correct choice is StartRoot 2 a squared EndRoot.