NCERT Exemplar Solutions
Class 10 - Mathematics - CHAPTER 10: Construction - Exercise 10.2
Question 4

Question. 4

A pair of tangents can be constructed to a circle inclined at an angle of \(170^\circ\).

Answer:

true

Detailed Answer with Explanation:

Step 1: When two tangents are drawn from an external point to a circle, they meet at some angle. Let this angle be \(\theta\).

Step 2: The angle between the two radii drawn to the points of contact is always the supplementary angle of \(\theta\). That means, angle between the radii = \(180^\circ - \theta\).

Step 3: Here, \(\theta = 170^\circ\). So, angle between radii = \(180^\circ - 170^\circ = 10^\circ\).

Step 4: A \(10^\circ\) angle at the centre of a circle is possible in geometry (it is a very small but valid angle).

Final Step: Therefore, it is possible to construct such a pair of tangents to the circle.

NCERT Exemplar Solutions Class 10 – Mathematics – CHAPTER 10: Construction – Exercise 10.2 | Detailed Answers