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Answer:

  A) 80°

Step-by-step explanation:

The sum of the angle measures in this hexagon is ...

  (6 -2)×180° = 720°

Then the value of x (in degrees) can be found from ...

  x + 2x = 720 -78 -134 -136 -132 = 240

  x = 240/3 = 80

The value of x is 80 degrees.

Answer:

A. 80°

Step-by-step explanation:

As we know that the sum of measures of angles of hexagon is 720 ° .

78° + 134 ° + 136 ° + 132 ° + 2x + x = 720°

combine like terms

480° + 3 x = 720°

subtract 480° from both side

480 ° - 480° + 3 x = 720° - 480°

3 x = 240°

Divide each side by 3

3x / 3 = 240°/3

x = 80 °.

Hence, value of x = 80°

Verification :-

if x = 80°

then ,

2x = 2 × 80° = 160°

Now, Sum of all angles of hexagon is

78° + 134 ° + 136 ° + 132 ° + 160° + 80° = 720°

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