【分析解答题】
RighttrianglePQRistobeconstructedinthexy-planesothattherightangleisatPandPRisparralleltothex-axis.Thex-andy-coordinatesofP,Q,andRaretobeintegersthatsatisfytheinequalities-4<=x<=5,6<=y<=16,howmanydifferenttriangleswiththesepropertiescouldbeconstructed?
A.110
B.1100
C.9900
D.10000
E.12100
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