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which is X, i dont see it on there
oops hold on there's an equation
ok, you need to know that the sum of the three angles in any triangle is 180 and the sum of the angles that make up a straight line is also 180
Yes, I get that but how do I put that into this problem?
They say SRT and STR are congruent, or the same angle, and they tell you one of the values
okay so would 4x=140
Angles that make up a straight line total 180, supplimentary angles STU + STR = 180
okay so instead of looking at this like a triangle I should look at this like its two angles that are supplementary?
you can look at it a few different ways, the short way i just did it was to realize STU + STR = 180 20 +4x = 180 4x = 160 x = 40
or if you want to use the fact that all 3 angles in a triangle add to 180 you can draw this ...
but wouldn't it be 40+4x=180?
oh wait I see because your only involving one of the angles, thanks!!!
yeah that looks confusing but thanks I got it now!!!
yeah, or you can draw that second line parallel to U, and use alternate interior angles are equal, the transversal is ST
yeah i see thanks