As shown in the figure, given that points B, C and D are on the same straight line, △ ABC and △ CDE are equilateral triangles. Be intersects AC at F, ad intersects CE at h. ① verify: △ BCE ≌ △ ACD; ② verify: CF = ch; ③ judge the shape of △ CFH and explain the reason

As shown in the figure, given that points B, C and D are on the same straight line, △ ABC and △ CDE are equilateral triangles. Be intersects AC at F, ad intersects CE at h. ① verify: △ BCE ≌ △ ACD; ② verify: CF = ch; ③ judge the shape of △ CFH and explain the reason

① In △ BCE and △ ACD, in △ BCE and △ ACD, in △ BCE and △ ACD, in △ BCE and △ ACD, BC = AC ∈ BCE ＝ ∈ acdce = CD, and △ BCE ≌ ≌ ≌ ≌ ≌ ≌△ ACD (SAS); ② \8780 8780 \≌ ≌\8780; \\\\\ \\\\\\\\\\\\\\\\\\\theresults show that ≌ BCF ≌ ach (ASA), ≌ CF = ch; ③ ∵ CF = ch, ∠ ACh = 60 ° and ∵ CFH is an equilateral triangle