(1)DE与BC的位置关系为 ;
(2)如图②,连接CD,BE,若M为BE的中点,连接AM,请探究线段AM与CD的关系,并给予证明;
(3)如图③,已知E是正方形ABCD的边BC上任意一点,以AE为边作正方形AEFG,连接BG,M为BG的中点,连接AM.
①若AB=4,BE=3,求AM的长;
②若AB=a,BE=b,则AM的长为 .(用含a,b的代数式表示)
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