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In Below Fig, Determine the Value of X. - CBSE Class 9 - Mathematics

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Question

In below fig, determine the value of x.

Solution 1

In the given figure:

AOB is a straight line. Thus,∠AODand  ∠BODform a linear pair.

Therefore their sum must be equal to180°.

We can say that

 ∠AOD+∠BOD = 180°

It is given that ∠AOD=150°, substituting this value in equation above, we get:

`150° + x = 180°`

              ` x = 180° - 150°`

              `  x =30°`

Solution 2

Since sum of all the angles round a point is equal to 360°.Therefore

⇒ 3x + 3x +150 + x = 360°

⇒ 7x° = 360° -150°

⇒ 7x = 210°

⇒ x = `210/7`

⇒ x = 30°

  Is there an error in this question or solution?

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Solution In Below Fig, Determine the Value of X. Concept: Concept to Lines and Angles.
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