Question

about circle and some problems on it

Answer 1

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1. Circle is the locus of points in a plane which are equidistant from a fixed point.

2. A line segment joining the centre to any point on the circle is called radius of the circle.

3. The perimeter of a circle is called its circumference.

4. A chord of a circle is a line segment joining any two points on the circle.

5. A diameter is a chord of a circle passing through the centre of the circle.

6. A line which intersects a circle in two distinct points is called a second of the circle.

7. A line that intersect the circle at exactly one point is called a tangent to the circle.

8. The region consisting of all points lying on the circumference of a circle and inside it is called the interior of the circle.

9. The region consisting of all points lying outside a circle is called the exterior of the circle.

10. The region consisting of all points which are either on the circle or lie inside the circle is called a circular region.

11. Circle which have the same centre and different radii are called concentric circle.

12. A continuous piece of a circle is called an Arc of the circle.

13. A diameter of a circle divides it into two equal arcs. Each of the two hours is called a semicircle.

14. If the length of an Arc is less than the length of the arc of the semicircle then it is called a minor arc.