Respuesta :

omg888205

Answer:

angle B=100 degrees

vertically opposite angle

angle B +x= 180 degree

100-180=x

80 degree =x

Dead3ill

Answer:

x = 80°

Step-by-step explanation:

GIVEN :-

  • AD ║ EH
  • CG as transversal
  • ∠CBD = 100°
  • ∠EFB = x°

TO FIND :-

  • The measure of x°

PROCEDURE :-

∠CBD + ∠FBD = 180°      (∵ ∠CBD & ∠FBD form a linear pair )

⇒ ∠FBD = 180° - 100° = 80°

Also,

∠FBD = ∠EFB       (∵ Alternative Interior Angles are equal )

⇒ x = 80°