如图①,在□ABCD的形外分别作等腰直角△ABF和等腰直角△ADE,∠FAB=∠EAD=90°,连结AC、EF.在图中找一个与△FAE全等的三角形,并加以证明.
应用
以□ABCD的四条边为边,在其形外分别作正方形,如图②,连结EF、GH、IJ、KL.若□ABCD的面积为5,则图中阴影部分四个三角形的面积和为 .
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