As shown in the figure, in △ ABC, ab = AC, and points D, e and F are the midpoint of △ ABC

As shown in the figure, in △ ABC, ab = AC, and points D, e and F are the midpoint of △ ABC

It is proved that: ∵ D, e and F are the midpoint of △ ABC, respectively, ∵ de ∥ 12ac, EF ∥ 12ab, and ∵ quadrilateral ADEF is parallelogram

If the diamond shaped bdef is in the triangle ABC, ab = 18, AC = BC = 12, what is the perimeter of the diamond shaped bdef?

12

If the diamond befd is inscribed in the triangle ABC, ab = 18, AC = = BC = 12, find the perimeter of the diamond~
If the diamond befd is inscribed in the triangle ABC, ab = 18, AC = = BC = 12, find the perimeter of the diamond~

If point D is on AB, point E is on BC, and point F is on AC, because the diamond is inscribed on the triangle, so de / / BC and triangle ade are similar to triangle ABC. Let DF = x = BD = be = EF, then ad = 18-x, so,
18-x / 18 = x / 12 gives X=
You can count it yourself. Thank you for your 5 points