Question

Important please answer with explanation

Answer 1

Answer:

angle f = 80 degrees

Step-by-step explanation:

FD/AB = 7.6/3.8 = 2

DE/AC = 12/6 = 2

BC/ED = 6root3 / 3 root3 = 2

so, all the 3 sides are proportional, by sss similarity theorem, triangle ABC is similar to triangle DEF.

In similar triangles, corresponding angles are equal, so angle A=angle F=80 degrees

hope it helps :)