典型例题: “Solve the quadratic equation 2x² - 5x - 3 = 0.” “Find the nth term of the sequence: 5, 8, 11, 14, ...”
模块二:几何与测量(约占30%)
核心知识点:
基础几何:角度计算、三角形与多边形性质
圆的性质:切线、弦、扇形面积与弧长计算
三角学:正弦、余弦、正切在直角三角形中的应用
测量计算:面积、体积、表面积极其单位换算
坐标几何:直线方程、两点间距离、中点坐标
典型例题: “Calculate the area of a sector with radius 6cm and angle 60°.” “Find the equation of the line passing through points (2,3) and (5,11).”
模块三:统计与概率(约占30%)
核心知识点:
数据处理:平均数、中位数、众数的计算比较
数据展示:饼图、柱状图、散点图的绘制与解读
概率基础:基础概率计算、树状图、列表法
简单相关:识别正相关、负相关关系
典型例题: “The mean of five numbers is 12. If four of them are 8, 10, 15, 14, find the fifth number.” “A bag contains 3 red and 5 blue marbles. Two are drawn without replacement. Find P(both red).”