Mathematics
Grade9
Easy
Question
The value of x is
- 4
- 6
- 7
- -10
Hint:
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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