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歡迎您訪問數學考題練習:已知A(1,-1),B(2,0.5),C(-2!

數學考題練習:已知A(1,-1),B(2,0.5),C(-2

更新時間:2024-01-12 14:01:38作者:貝語網校

已知A(1,-1),B(2,0.5),C(-2,3),D(-1,-3),E(0,-3),F(4,-1.5),G(5,0),其中在第四象限的點有個

A.1

B.2

C.3

D.4

試題答案

B

試題解析

根據點在第四象限內的坐標特點解答.

解答:滿足點在第四象限的條件是橫坐標大于0,縱坐標小于0,那么由題干可知在第四象限的點有A(1,-1),F(4,-1.5)兩個.

故選B.

點評:本題主要考查了平面直角坐標系中各個象限的點的坐標的符號特點.四個象限的符號特點分別是:第一象限(+,+);第二象限(-,+);第三象限(-,-);第四象限(+,-).

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