As shown in the figure, in ladder ABCD, ad is parallel to BC, angle B = 90, AB is perpendicular to BC, ad = 2, BC = 8, and point E is on line CD As shown in the figure, in ladder ABCD, AD / / BC, ∠ B = 90 ° ab ⊥ BC, ad = 2, BC = 8, and point E is on line CD If the trapezoid ABCD is folded along be, point C falls on point P of ray am 1. When point P and point a coincide, find the length of CD 2. Find the length of crease be in 1 3. Let PA = x, be = y, find the functional relationship between Y and X

As shown in the figure, in ladder ABCD, ad is parallel to BC, angle B = 90, AB is perpendicular to BC, ad = 2, BC = 8, and point E is on line CD As shown in the figure, in ladder ABCD, AD / / BC, ∠ B = 90 ° ab ⊥ BC, ad = 2, BC = 8, and point E is on line CD If the trapezoid ABCD is folded along be, point C falls on point P of ray am 1. When point P and point a coincide, find the length of CD 2. Find the length of crease be in 1 3. Let PA = x, be = y, find the functional relationship between Y and X

Guo Dunyong answers: 1. When point P coincides with point a, find the length of CD. (I did this, equal to 10) do DG ⊥ BC to g, then DG = AB = 8, connect AC to be to F, then be ⊥ AC, CF = AF, point C coincides with point a, CG = 8-2 = 6, ≁ CD = √ (8 ⊥ 178; + 6 ⊥ 178;) = 10.2. Find the length of crease be in 1. Make eh ⊥ BC to h, then BH =