Geogebra/C2/Spreadsheet-View-Basics/English-timed

Time	Narration
00:01	Hello Everybody. Welcome to the Geogebra tutorial on Basics of Spreadsheets.
00:05	If this is the first time you are using Geogebra, please see the Introduction to Geogebra tutorial on the spoken tutorial website.
00:12	To get started with Geogebra, I am using the GNU/Linux operating system Ubuntu Version 10.04 LTS and the Geogebra Version 3.2.40.0.
00:23	The objective of this tutorial is to see how to use the Spreadsheet in Geogebra.
00:29	In this tutorial, we will use the spreadsheet to perform basic data representation and calculations
00:36	and Use the data to construct a histogram.
00:39	We will also see how the spreadsheet view can be used to create recurring Geogebra objects like creating a set of parallel lines.
00:49	First, we will use the marks of 50 students in a 50 mark test.
00:53	the From and to class boundaries and frequency is available here.
00:59	I am going to copy the frequency on to the clipboard.
01:05	Now to the geogebra window.
01:09	The first step is to make the spreadsheet view visible.
01:13	Select the menu item view, and check the spreadsheet view.
01:19	lets move the spreadsheet view here.
01:25	the first column A represents the from class boundary. column b To and column c frequency.
01:36	Now I have copied the frequency , so let me paste it here.
01:41	Now for the From and To values.
01:46	I did not paste these because I will show you another feature of geogebra spreadsheets.
01:53	First I will start with
01:56	0,
01:59	then 5, 5
02:04	and 10.
02:06	Now if I select the two cells here and then drag this blue square all the way down, notice an arithmetic progression is created.
02:16	Similarly, I can do that for the To value.
02:22	Let us create the class boundary list and the frequency list. To do that, select the column B here.
02:30	Right Click and say create List. Notice L1 here which means L_1 is created.
02:40	We just have to modify this by right clicking and checking on object properties and making sure the first value zero appears here.
02:53	and press close.
02:57	Now for the frequency list, do the same thing. Select the frequency right click and say create list.
03:04	I have L_2.
03:09	Now to create the histogram , go to the input bar here.
03:15	You can select from the commands here or you can just type histogram.
03:22	Now right here between the square brackets, if you press Enter it tells you the different options.
03:28	One of the options is the list of class boundaries and list of raw data.lets use that.
03:35	I would say L_1 geogebra is case sensitive and for the class boundaries and L_2 for the frequencies and press Enter.
03:47	Notice that the histogram is created here.
03:52	Now, to make the histogram more visible or readable , I will use the move drawing pad. And then I will also right click on drawing pad properties here and change this distance to 5 which is the width of each bar and say Close.
04:15	Then I can zoom out.
04:22	And again move the drawing pad.
04:28	Notice when I create the histogram, it creates this value a=250.
04:34	A is the sum of the product of length and width of each bar.
04:41	I can move this A value up here.
04:49	the next step is to create points and lines in the spreadsheet view to get a set of parallel lines to the Y axis.
04:56	I will take a new Geogebra window.
05:02	Now any command from the Geogebra can be typed in a cell here.
05:07	First to create a point, you just have to give a point like this.
05:19	Notice the point appears here with the name A1, which is column A row 1, the cell address with coordinates 1,2.
05:34	Similarly I can type in here 2.2 and press enter I get A2.
05:45	Now If I select these two cells and then drag the blue square down,
05:54	Let me move this here.
05:56	For this tutorial I will close the Algebra view.
06:02	notice I get 10 points here.
06:08	And similarly I will, in column B, I will.
06:16	1,4 as a point I get this point here I can right click and say show label it shows B1 the cell address.
06:28	I can type in
06:35	2,4 and I get b 2.
06:41	I can again drag this and I get 10 points here.
06:48	Now In the third column, if i want to create the line segment.
06:56	I can use the geogebra command segment and in the value I can give the cell address A1.
07:08	let me move this here
07:12	,B1 and say enter.
07:17	this is the length of the line which is between A1 and B1.
07:23	Now I can just select this cell and drag it all the way down, I get a set of 10 parallel lines.
07:33	One more thing to note is if you go to options and Algebra.
07:40	Right now it's at value so you see the length of the line in the column C.
07:44	I can change it to command and it will show me the command.
07:51	Now to do assignments ,
07:55	In the first assignment create a histogram using the following data of a Distance between home and school for a class of 35 students.
08:04	I have the class boundaries and frequencies here.
08:09	Use the spreadsheet view to represent the data Create class boundary and Frequency lists.
08:15	Use the input bar to create the histogram with the lists.
08:18	Change the frequency and observe the change in the histogram.
08:22	I have already created this tutorial here.
08:26	notice the
08:31	histogram here.
08:33	Now to the next assignment.
08:36	In assignment two, we will Create concentric circles using the spreadsheet view
08:43	Draw a point A on the drawing pad to mark the centre of the circle. Use the spread sheet to create a column A of Radius
08:52	Use column B of the spreadsheet to create the circles with centre A and the radius from Column A.
08:58	Move the Centre point A and observe.
09:02	I have created assignment here.
09:06	Move the center point and
09:10	observe the circles.
09:12	I would like to acknowledge the spoken tutorial project which is part of the talk to a teacher project.
09:18	It is supported by the National Mission on Education through ICT, MHRD government of India.
09:23	You can see more information about this at this website.
09:27	Thank you this is Bindu, signing off. Enjoy exploring Geogebra.

Contributors and Content Editors

Madhurig, Minal, Pratik kamble, Sandhya.np14