18- answer is 120 to find this: first find the remaining angle in ABF 180-(55+40)=180-95=85 F has two angles. if F1 is 85 F2 is 85,too.(coterminal angles) now you can find the interior angle of CDF 180-(35+85)=180-120=60 the you should find the exterior angle(exterior angle + interior angle =180) 180-60=120 x=120
20 x=48 y=82 ABC is parallel to EF so to find x: 180-132=48 and for y: 180-((180-130)+48)=180-(50+48)=180-98=82 hope this helps
