Respuesta :

Answer:

x = 36˚

Step-by-step explanation:

  • The 2 base angles in an isosceles triangle are equal
  • Angles in a triangle sum to 180˚
  • [tex]x+72+72=180[/tex]
  • [tex]x+144=180[/tex]
  • [tex]x=180-144=36[/tex]
devishri1977

Answer:

Step-by-step explanation:

In isosceles triangle, the base angles (the angles opposite to equal sides) are equal.

∠A = ∠B = 72

72+ 72 + x = 180  {Angle sum property of triangle}

   144 + x = 180

            x = 180 - 144

           x = 36°

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