Advertisement Remove all ads

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

Advertisement Remove all ads
Advertisement Remove all ads
Advertisement Remove all ads
Answer in Brief

In below fig, determine the value of x.

Advertisement Remove all ads

Solution 1

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°

Solution 2

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°`

Concept: Introduction to Lines and Angles
  Is there an error in this question or solution?

APPEARS IN

RD Sharma Mathematics for Class 9
Chapter 10 Lines and Angles
Exercise 10.2 | Q 8 | Page 15
Advertisement Remove all ads
Share
Notifications

View all notifications


      Forgot password?
View in app×