Question

Which one is correct?

Answer 1

Answer:

85 (D.)

Step-by-step explanation:

The sum of all the degrees in a quadrilateral is 360, and since a triangle is half of a quadrilateral, the sum of the degrees in a triangle is 180.

With the given information, we can create the equation:

40+55+x=180

Simplifying on the left side gives us:

95+x=180

Subtracting 95 from both sides gives us:

x=85

Therefore, the solution to your problem is 85.

Hope this helped!

Answer 2

Answer:

85°

Step-by-step explanation:

Just add the known angles and subtract them from 180 to get the missing angle.