Answer :

The answer is 28°

Since the sum of all angles of a triangle is 180°
Then 23°+129°+x=180°
So 23°+129°= 152°

So, 152°+x=180°

Now to find x, you will take 152 to the other side of the equal sign so it will become

X= 180°-152°
X=28°
ElephantHouse

Answer:

x = 28

Step-by-step explanation:

Properties of a triangle:

  • Triangles have 3 sides
  • The sum of a triangle's interior angles will always be equal to 180°.

Because we need the value of the triangle's interior angle, use the following formula to solve for x:

  • 180 - x - y = z
  • Since x and y are given, solve for z.
  • 180 - 129 - 23 = z
  • 28 = z
  • z is the missing value, so for your problem, z is x.
  • x = 28

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