很多新手对于GMAT数学不是十分自信,究其原因往往就是是由于对于GMAT数学知识点没有复习,而直接做题,为此小编特收集整理了关于几何的GMAT数学知识点,分享给大家,希望对大家有所帮助,文中观点仅供参考。
1. Lines planes 直线与平面
① 两直线平行并为第三条直线所截后,相应角的关系。
② 直线与平面的关系。
例:If n distinct planes intersect in a line, and another line L intersects one of these planes in a single point,
what is the least number of these n planes that L could intersect?
n n-1 n-2 n/2/2
【解析】只会有一个和插入的平面是平行的,非平行即相交。正确答案选择 B。
2. Triangles 三角形
① 勾股定理:a2+b2=c2
② 构成三角形的条件:两边之和大于第三边。
③ 三角形内部边和角的关系:大边对大角。
3. Quadrilaterals 四边形
① parallelogram : 面积=a 周长=2
② rectangle : 面积=a 周长=2
③ square : 面积=a2 ; 周长=4a
④ trapezoid : 面积=h/2
4. Circles 圆
① 面积=R2
② 周长=2R
5. Polygons 多边形
多边形内角和:180
6. Rectangular Solids 长方体
① 体积=abc
② 表面积=2
7. Cubes 正方体
① 体积=a3
② 表面积=6a2
8. Cylinders 圆柱
① 体积=R2h
② 表面积=2Rh
9. Coordinate Geometry 解析几何
① 直线的标准方程:y=kx+b ;即斜截式,其中 k 为斜率 slope,b 为 y 轴截距 y-intercept
② 斜率的计算:K= /
③ 两点或一点加斜率确定一条直线。
④ 两直线垂直,其斜率的乘积为-1。
以上就是对几何这一GMAT数学知识点的全部介绍,分别从基本概念,解题方法等角度对这一概念进行的解释,最后祝大家都能考出好成绩。
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