Right triangle PQR is to be constructed in the xy-plane so that the right angle is at P and PR is parallel to the x-axis. The x and y coordinates of P, Q and R are to be integers that satisfy the inequalities -4 <= x <= 5 and 6 <= y <= 16. How many different triangles with these properties could be constructed?
(A) 110
(B) 1,100
(C) 9,900
(D) 10,000
(E) 12,100
[spoiler]OA is C. I am getting 990 as the answer. Where am I getting wrong ?[/spoiler]
(A) 110
(B) 1,100
(C) 9,900
(D) 10,000
(E) 12,100
[spoiler]OA is C. I am getting 990 as the answer. Where am I getting wrong ?[/spoiler]
Last edited by hey_thr67 on Fri Jun 08, 2012 3:47 am, edited 1 time in total.
