Answer:
[tex]x=42.5^o[/tex]
Step-by-step explanation:
Notice that this is an isosceles triangle, so the angles opposite to the sides of equal length (40 units) must be equal. That means that angleD = angleE
Then using the rule for addition of interior angles of a triangle equal to 180, we can write:
angleD + angleE + angleF = 180 degrees
x + x + 95 = 180
2 x = 180-95
2 x = 85
x = 85/ 2
x = 42.5 degrees
