# Class 9 RD Sharma Solutions – Chapter 16 Circles- Exercise 16.1

**Question 1: Fill in the blanks:**

**(i) All points lying inside/outside a circle are called ______ points/_______ points.**

**(ii) Circles having the same centre and different radii are called _____ circles.**

**(iii) A point whose distance from the centre of a circle is greater than its radius lies in _________ of the circle.**

**(iv) A continuous piece of a circle is _______ of the circle.**

**(v) The longest chord of a circle is a ____________ of the circle.**

**(vi) An arc is a __________ when its ends are the ends of a diameter.**

**(vii) Segment of a circle is a region between an arc and _______ of the circle.**

**(viii) A circle divides the plane, on which it lies, in _________ parts.**

**Solution:**

(i)Interior/Exterior

(ii)Concentric

(iii)The Exterior

(iv)Arc

(v)Diameter

(vi)Semi-circle

(vii)Centre

(viii)Three

**Question 2: Write the truth value (T/F) of the following with suitable reasons:**

**(i) A circle is a plane figure.**

**(ii) Line segment joining the centre to any point on the circle is a radius of the circle,**

**(iii) If a circle is divided into three equal arcs each is a major arc.**

**(iv) A circle has only finite number of equal chords.**

**(v) A chord of a circle, which is twice as long as its radius is the diameter of the circle.**

**(vi) Sector is the region between the chord and its corresponding arc.**

**(vii) The degree measure of an arc is the complement of the central angle containing the arc.**

**(viii) The degree measure of a semi-circle is 180**^{°}.

^{°}.

**Solution:**

(i)True

(ii)True

(iii)True

(iv)False

(v)True

(vi)True

(vii)False

(viii)True

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