Circumference of circle
Introduction
The circumference of the circle is defined as the linear distance around it or if a circle is opened in the form of straight line then the length of that straight line will be the circumference of circle.
objectives
Design an applet to show circumference of circle.
User Guidelines
-Move the slider a then the circle opened in a straight line is called circumference of circle or the length of straight line represent the circumference of circle.(perimeter of circle)
Applet
Test your understandings
Q.n in the above applet which of the following indicate the circumference of circle?
Select all that apply
- A
- B
- C
- D
Construction Protocol
1.open a new GeoGebra Window.
2. create center O(0,0) by using input bar.
3.Take a point A(0,1)by using input bar.
4. Create a slider a with min-0.01,max-7,increment-1 by using slider tool.
5.Take a point C(a,1) by using input tool.
6.Take a circle through the point C and radius 1 by using circle tool.(circle through radius and center).
7.create a point on circle by using (point on object) point tool and put the point on x-Axes.
8.Input Rotate(B,-a,C) by using input bar.
9.Take a circular arc CDD' by using circle tool(circular sector tool)
10.Join segment OD by using segment tool.
11. color the segment OD and arc CDD' by same color and hide the objects by using object properties.
12. Move the Slider to see the circumference of circle.
13.Save your ggb applet in file.