Question

Someone please help.

Answer 1

Because the triangle is equilateral. And it is on a straight line.

Hope that helped!

Answer 2

.

`answers \\ a. \: x = 60 \\ b. \: being \: alternate \: interior \: angles \\ solution \\ all \: sides \: of \: triangle \: are \: equal \\ ab = bc = ac \\ < abc = < acb = < bac = y \\ < abc + < acb + < bac = 180 \\ or \: y + y + y = 180 \\ or \: 3y = 180 \\ or \: y = (180)/(3) \\ y = 60 \\ < acb = < cad \\ < cad = x = 60( \: being \: alternate \: interior \: angles) \\ hope \: it \: helps...`