【探究1】(1)如图,点是矩形边上一点,连接,将沿翻折,点刚好落在边上的点处,若,,求长.
【探究2】(2)操作:如图,点是正方形上一动点,连接,将沿翻折,点落在正方形内一点处,请用无刻度直尺作出的角平分线,并说明理由.
【探究3】(3)如图,点是矩形边上一点,连接,将沿翻折,点落在矩形外一点处,连接,若,,,则的面积是________.
【探究4】(4)如图,点是矩形边上一点,连接,将沿翻折,点落在点处,的角平分线与的延长线交于点,若,,当点从点运动到点时,点运动的路径长是_______.
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