|
- 精华
- 0
- 积分
- 990
- 经验
- 990 点
- 威望
- 98 点
- 金钱
- 98 ￥
- 魅力
- 98
|
OG-数学-229
229. 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 |
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