Mathematics
Grade9
Easy

Question

The value of x is

  1. 4
  2. 6
  3. 7
  4. -10

hintHint:

Using sum of angles in a triangle is 180° .solve the equation to find the value of x.

The correct answer is: -10


    From the above triangle 50 ° , 70° and (x+70)° are the angles.

    (x+70)° + 70° + 50° = 180° (sum of angles in a triangle)

    x° + 190° = 180°

    x° = 180° - 190° = -10°

    Therefore, the value of x is -10.

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