题目

如图,平面直角坐标系中,△ABC的顶点坐标为:A(1,2),B(2,﹣1),C (4,3). (1)将△ABC向左平移2个单位长度,再向上平移1个单位长度,得△A'B'C'.画出△A'B'C',并写出△A'B'C'的顶点坐标; (2)求△ABC的面积. 答案:解:(1)如图所示,△A'B'C'即为所求, 点A′(﹣1,3),B′(0,0),C′(2,4); (2)△ABC的面积为3×4﹣×1×3﹣×2×4﹣×1×3=5.根据句意,在答题纸标有题号的横线上,写出括号内所给单词的适当形式。每空只写一词。【1】 Look! The baby's(tooth) are coming out!【2】When the temperature(drop) to 0℃, the water will become ice.【3】一Doctor. I feel even(ill) today than yesterday.一Let me take a look.【4】The article is quite good except for a few(spell) mistakes.【5】一What a building! Do you know its exact(high)?一Yes. It's about 118 meters high.
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