2. circle topic mathematics grade 10.pptx

2. circle topic mathematics grade 10.pptx

1. Circle

2. Circle The set of all points on a plane that are a fixed distance from a center. A  circle  is a simple shape of consisting of those points in a plane that are equidistant from a given point, the center. 

3. Circle illustration showing a radius, a diameter, the center and circumference

4. Radius The distance between any of the points and the centre is called the radius. The  Radius  is the distance from the center to the edge.

5. Diameter The diameter is a line segment that connects two points on the circle and goes through the centre of the circle. It is always twice as long as the radius. The  Diameter  starts at one side of the circle, goes through the center and ends on the other side.

6. Circumference The  Circumference  is the distance around the edge of the circle.

7. Radius, Diameter and Circumference

8. Chord, Arc , Center and Diameter

9. Chord A chord is a line segment whose endpoints are at any two points on the circle and it doesn’t pass through the centre

10. Arc An arc of a  Circle  is a curved line drawn between two points along the circumference of a Circle .

11. Segement A segment is a region bounded by a chord and an arc lying between the chord’s endpoints. Segment

12. Semicircle A semicircle is an arc that is defined by diametric points along the circle. This arc is as large as half (semi) the circle. Half a circle is called a  Semicircle. C=2* Π *r

13. Sector Sector , is the portion of a disk enclosed by two radii and an arc, where the smaller area is known as the minor sector and the larger being the major sector. Sector

14. Segment and Sector The "pizza" slice is called a  Sector . And the slice made by a chord is called a  Segment .

15. Area of a Circle The area of a circle is  π  times the radius squared, which is written: A =  π  × r 2