In △ ABC, the bisectors of ab ≠ AC, ABC and ACB intersect at O, and the bisectors of AB and AC intersect at e and F through o as EF ‖ BC (1) As shown in Figure 1, write out all the isosceles triangles in the graph. Guess: what is the relationship between EF and be, CF, and explain the reason. (2) as shown in Figure 2, the bisector Bo of ∠ ABC in △ ABC intersects the bisector Co of the outer angle of the triangle at O, and make OE ‖ BC at O, AB at e, and AC at F. is there any isosceles triangle in the graph? If so, point out them respectively. Write down the relationship between EF and be, CF, and explain the reason

In △ ABC, the bisectors of ab ≠ AC, ABC and ACB intersect at O, and the bisectors of AB and AC intersect at e and F through o as EF ‖ BC (1) As shown in Figure 1, write out all the isosceles triangles in the graph. Guess: what is the relationship between EF and be, CF, and explain the reason. (2) as shown in Figure 2, the bisector Bo of ∠ ABC in △ ABC intersects the bisector Co of the outer angle of the triangle at O, and make OE ‖ BC at O, AB at e, and AC at F. is there any isosceles triangle in the graph? If so, point out them respectively. Write down the relationship between EF and be, CF, and explain the reason

(1) The equilateral triangles in the figure are △ BeO, △ CFO and △ CFO