Respuesta :

Hi1315

Answer:

[tex]55 \degree[/tex]

Step-by-step explanation:

Let the unknown angle be x

As the interior angles in a triangle are added up to 180°

[tex]x + 45 + 80 = 180 \\ x + 125 = 180 \\ x = 180 - 125 \\ x = 55 \degree[/tex]

Hope this helps you.

Let me know if you have any other questions:-)

janafaroukjeje2007

Answer:

55

Step-by-step explanation:

  • Since the sum of all angles in the triangle = 180°
  • Since the sum of two angles in the triangle =45°+80°= 125°
  • Then measure of the third angle = sum of all angles of triangle - the sum of two angles in the triangle = 180° - 125° = 55°

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