Respuesta :

Solution:

  • The sum of all angles of a triangle is 180°
  • Therefore, 87° + 57° + x° = 180°

or, 144° + x° = 180°

or, x° = 180° - 144°

or, x° = 36°

or, x = 36.

Answer:

x = 36

Hope it helps.

Do comment if you have any query.

bibt538

Answer:

87 deg + 57 deg + x = 180deg ( sum of angles of triangle is 180deg)

or, x = 180deg - 144 deg

: . x = 36 deg