Find the value of x.

I added an attachment please help I don't need an explanation.

69

Step-by-step explanation:

(x+54+57)=180

x=69

for the first question it would be the second answer for the second question it would be the third answer and for the third question it would be the first answer

step-by-step explanation:

step-by-step explanation:

∆abc has the points a(1, 7), b(-2, 2), and c(4, 2) as its vertices. formed with the point d(1, 2) as its third vertex, then ∆abd is triangle.