[問題]一題來欣M2的數學
Rught triangle PQR is to be constructed in the xy-plane so that the right
angle is at 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
inequalitues -4≦x≦5 and 6≦y≦16.
How many different triangles with these properties could be constructed?
(A) 100
(B) 1,100
(C) 9,900
(D)10,000
(E)12,100
答案是(C)
算了很久算不出來 請大家幫忙了~"~
謝謝^^
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