(1)图1、图2均为正方形网格,请仅用无刻度直尺完成下列画图,保留作图痕迹.
①如图1,点A、B为格点,画出线段的中点O;
②如图2,点A、B、C为格点,画出的平分线;
(2)借助(1)中画图的经验解决下面的问题:
如图,已知平行四边形中,请仅用一把无刻度直尺完成下列画图,保留作图痕迹.
①如图3,点E、F分别在、上,,连接,请在上画点O,使点O为的中点;
②如图4,若,点E为上一点,请在上画点G,使;
③如图5,在②的条件下,若,连接,点P为上一点,请以为边画一个菱形,你所画的菱形为______.
同类型试题
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2