Respuesta :

Wallameg000

Answer:

89 degrees

Step-by-step explanation:

Triangles will always have 180 degrees. This means that given 2 angles, we can find the missing measurement.

Setting Up an Equation

To help us solve for the unknown angle, a, we can set up an algebraic equation. To make this equation remember that all 3 internal angles sum to 180.

  • 14 + 77 + a = 180

This is only one equation that you could set up to represent this situation.

Solving For a

Now that we have an equation we can begin to solve it. First, combine like terms that are on the same side of the equation.

  • 91 + a = 180

Next, subtract 91 from both sides.

  • a = 89

To check our answer we can plug it back into the original equation.

  • 14 + 77 + 89 = 180
  • 180 = 180

This means that the missing angle must be 89 degrees.
answer: 89 degrees. Missing angle is 89 degrees.
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