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Question

When an arm of an angle is extended to double its length, then the measure of the angle:

This question was previously asked in
RRB NTPC 2019 CBT 1 Question Paper (8-Mar-2021) (Shift 2)
The correct answer is
remains the same

Angle Measure Fundamentals

An angle is formed by two rays (called arms) sharing a common endpoint, the vertex. The measure of the angle quantifies the amount of rotation between these two rays.

Impact of Extending Angle Arms

Consider an angle $\theta$. Its measure is determined solely by the relative orientation of its two arms originating from the vertex.

  • Extending the length of an arm means making the ray longer, starting from the vertex.
  • This extension does not alter the direction or inclination of the ray itself.
  • Since the relative orientation between the two arms remains unchanged, the angle's measure ($\theta$) is unaffected.

Therefore, even if an arm of an angle is extended to double its length, the measure of the angle remains the same.

Correct Answer: Option 4, remains the same.

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Similar Questions

  1. The measure of an angle is one half of its supplementary angle. Find its measure.
  2. The sum of two angles is $155^\circ$ and their difference is $\frac{\pi}{2}$. The value of the greater angle (in radians) is:
  3. The measure of an angle is three times the measure of its complement. The angles are respectively:
  4. The supplement of $70^\circ$ is:
  5. The cost price of 120 g of rice is the same as the selling price of 150 g of it. The percentage loss is:
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  8. What is the sum of the angle complementary to $15^\circ$ and the angle supplementary to $125^\circ$?

  9. Two adjacent angles form an angle of $100^{\circ}$. The larger angle is $20^{\circ}$ less than five times the smaller angle. The larger angle is:
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Important Questions from Lines and Angles

  1. Two parallel lines are intersected by a transversal, the corresponding angles are:

  2. If l, m, n are lines such that, l is parallel to n and m is parallel to n, then, ______

  3. There are three points P, Q and R on a straight line such that PQ : QR = 3 : 5. If n is the number of possible values of PQ : PR, then what is n equal to ?

  4. Two cars start from a point at the same time and travel on two different roads at right angles to each other. Their speed is 18 km/h and 72 km/h respectively. What will be the distance between them after 6 seconds?

  5. If angles of a triangle are in the ration of 2 : 3 : 4, then the measure of the smallest angle is:

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