In the figure, ACD and ECB are straight lines and EF || AD. If
angle FEC = 2 angle CAB, prove that triangle ABC is an isosceles triangle.

#See details below

Step-by-step explanation:

#An  isosceles triangle has two equal angles:

#An  isosceles triangle has two equal sides;

Using sine rule:

Now, given that ABC has two equal sides and two equal triangle it is  an isosceles triangle.

x-150=475   x=625

step-by-step explanation:

if the bike after the sale ($150) is $475 then just simply add 150 to 475.

(8+64)^2= 5184 < answer

step-by-step explanation:

2^3 = 8

4^3= 64

(8+64)^2 = 5184