The document RD Sharma Solutions -Ex-16.1, Circles, Class 9, Maths Class 9 Notes | EduRev is a part of the Class 9 Course RD Sharma Solutions for Class 9 Mathematics.

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**Q1) Fill in the blanks:**

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

**Solution: ** Interior/Exterior

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

**Solution: **Concentric

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

**Solution: **The Exterior

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

**Solution: **Arc

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

**Solution: **Diameter

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

**Solution: **Semi circle

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

**Solution: **Center

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

**Solution:** Three** **

**Q2) Write the truth value (T/F) of the following with suitable reasons:**

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

**Solution: T**

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

**Solution: T**

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

**Solution: T**

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

**Solution: F**

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

**Solution: T**

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

**Solution: T**

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

**Solution: F**

**(viii) The degree measure of a semi-circle is 180 ^{0}.**

**Solution: T**