[tex]2y + 90 + 50 = 180[/tex] (angle sum of triangle) y=15 [tex]3y + x + 90 = 180[/tex] (angle sum of triangle) [tex]3(15) + x + 90 = 180 \\ x = 45[/tex]
All angles make 180 degrees, so on the triangle to the right, 90 plus 50 makes 140, so we need 40. 40/2 = 20 so y=30.Therefore 3y= 60 and then add the right angle which makes 150. Now 180-160= 30, so the answer is B) 30.
