GRE考试

试题来源：2012年新GRE数学考试模拟练习题（1）
【分析解答题】Right triangle PQR is to be constructed in the xy-plane so that the right angle is at P and PR is parrallel to the x-axis. The x-and y-coordinates of P,Q,and Rare to be integers that satisfy the inequalities -4<=x<=5,6<=y<=16,how many different triangles with these properties could be constructed?
(A) 110
(B) 1100
(C) 9900
(D) 10000
(E) 12100

网考网解析：
解：本题首先应考虑赵有三条形的构成，对于-4<=X<=5 10个数而言，须取两个点构成直... 查看试题解析出处>>