Question 61509
I am assuming that you're trying to find the missing angle of a triangle.  The angles of a triangle add to equal 180 degrees.
find the missing angle measure.  x at tip top,110 and 25 bottom
{{{x+110+25=180}}}
{{{x+135=180}}}
{{{x+135-135=180-135}}}
{{{highlight(x=45)}}} degrees
:
Happy Calculating!!!