Explanation:
80°+y =180°(angles on a str line)
80°+y =180°(angles on a str line)y=180°-80°
80°+y =180°(angles on a str line)y=180°-80°y=100°
80°+y =180°(angles on a str line)y=180°-80°y=100°120°+x=180°(angles on a staright line)
80°+y =180°(angles on a str line)y=180°-80°y=100°120°+x=180°(angles on a staright line)x=180°-120°
80°+y =180°(angles on a str line)y=180°-80°y=100°120°+x=180°(angles on a staright line)x=180°-120°x=60°
80°+y =180°(angles on a str line)y=180°-80°y=100°120°+x=180°(angles on a staright line)x=180°-120°x=60°z+60°=180°( angles on a staright line)
80°+y =180°(angles on a str line)y=180°-80°y=100°120°+x=180°(angles on a staright line)x=180°-120°x=60°z+60°=180°( angles on a staright line)z=180°-60
80°+y =180°(angles on a str line)y=180°-80°y=100°120°+x=180°(angles on a staright line)x=180°-120°x=60°z+60°=180°( angles on a staright line)z=180°-60z=120°
80°+y =180°(angles on a str line)y=180°-80°y=100°120°+x=180°(angles on a staright line)x=180°-120°x=60°z+60°=180°( angles on a staright line)z=180°-60z=120°w=80°(Exterior angles of a quad)
80°+y =180°(angles on a str line)y=180°-80°y=100°120°+x=180°(angles on a staright line)x=180°-120°x=60°z+60°=180°( angles on a staright line)z=180°-60z=120°w=80°(Exterior angles of a quad)x+y+z+w
80°+y =180°(angles on a str line)y=180°-80°y=100°120°+x=180°(angles on a staright line)x=180°-120°x=60°z+60°=180°( angles on a staright line)z=180°-60z=120°w=80°(Exterior angles of a quad)x+y+z+w=60°+100°+120°+80°
80°+y =180°(angles on a str line)y=180°-80°y=100°120°+x=180°(angles on a staright line)x=180°-120°x=60°z+60°=180°( angles on a staright line)z=180°-60z=120°w=80°(Exterior angles of a quad)x+y+z+w=60°+100°+120°+80°=360°
HOPE THIS HELPS!!