Answer: X=87
Step-by-step explanation: First and foremost, all triangles add up to 180 degrees, remember that.
In order to find this answer you need to set up an equation, we know all triangles add up to 180, now we just solve for X by plugging in a few numbers.
38+ 55+ X = 180
Add 38 and 55 to get 93.
93 + X = 180
Now bring 93 to the other side of your = using subtraction.
93 + X = 180 - 93
Now you can cancel out your 93, and do the math on the right side of the equation.
You're left with X= 87.
*If you want to check your answer you can do 38+55+87 and it should equal 180 because all triangles add up to 180.
Hope this helped!!
