How many squares?

This topic has expert replies
Junior | Next Rank: 30 Posts
Posts: 25
Joined: Mon Aug 24, 2009 5:50 am
GMAT Score:620

How many squares?

by levocap » Sat Sep 19, 2009 3:57 am
A certain square is to be drawn on a coordinate plane. One of the vertices must be on the origin, and the square is to have an area of 100. If all coordinates of the vertices must be integers, how many different ways can this square be drawn?
4
6
8
10
12

OE is 12. What is the conceptual way to solve this prob?
under-dog
Source: — Problem Solving |