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Byju's Answer
Standard VIII
Mathematics
Sum of Angles of a Polygon
If the interi...
Question
If the interior angles of a triangle are (x - 20)°, (2x - 10)°, and (x + 50)°, find the value of x.
40
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Solution
The correct option is
A
40
Given: (x - 20)°, (2x - 10)°, and (x + 50)°
We know that sum of all the interior angles of a triangle is 180°.
So, (x - 20)°+ (2x - 10)°+ (x + 50)° = 180°
4x + 20 = 180
4x = 160
x = 40
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