logging in or signing up pie charts whitesnake666 Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT lite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 235 Category: Education License: All Rights Reserved Like it (0) Dislike it (0) Added: August 12, 2010 This Presentation is Public Favorites: 0 Presentation Description pie charts Comments Posting comment... Premium member Presentation Transcript Feeling hungry? : Feeling hungry? Have a slice of pie ;) Pie charts : Pie charts Pie charts….. : Pie charts….. Let us see a set of data very easily Without using numbers Here’s one now…… Every pie chart has… : Every pie chart has… A title A key Sectors These follow…. Slide 7: Title Slide 8: A key Slide 9: Sectors More pie charts : More pie charts Now let’s try a real one : Now let’s try a real one Do a survey of the group and whether people prefer tea, coffee or neither, using the tally method Let’s see what that looks like as a pie chart End E3 here Constructing a chart : Constructing a chart Doing the Maths bit… Back to the Babylonians : Back to the Babylonians They divided a circle into 360 degrees This matched the number of days in a year very closely It is also a number with many factors, so it is easy to divide down and calculate with, without getting into fractions ;) Check out the factors of 360 : Check out the factors of 360 On your own or in pairs, work out as many factors of 360 as you can Answers follow… Factors of 360 : Factors of 360 1 2 3 4 5 6 8 Factors of 360 : Factors of 360 9 10 12 15 18 20 30 Factors of 360 : Factors of 360 36 40 45 60 72 90 120 180 Working out the angles… : Working out the angles… Let’s imagine we do a survey of 12 people to find out whether they prefer tea, coffee, or some other drink Let’s say there is 1 who prefers tea, 8 coffee and 3 some other drink… Working it out…. : Working it out…. Then 1 in 12 prefer tea 8 out of 12 prefer coffee 3 out of 12 prefer “other” drinks Changing the English to Maths : Changing the English to Maths 1 in 12 for tea = 1/12 8 out of 12 for coffee = 8/12 3 out of 12 for “other” = 3/12 Calculating the angles : Calculating the angles 1 tea out of 12 8 coffee out of 12 3 “other” out of 12 Tea sector = 1/12 x 360 Coffee = 8/12 x 360 “Other” = 3/12 x 360 Do the Maths….for tea : Do the Maths….for tea 1 x 360 12 You can put any number over 1 - this doesn’t change its value, and lets you multiply it as a fraction 1 x 360 12 1 Sector size for tea : Sector size for tea 1 x 360 12 1 1 x 360 = 360 360 divided by 12 = 30 So the sector for tea will be 30 degrees wide Slide 27: Do the Maths….for coffee 8 x 360 12 You can put any number over 1 - this doesn’t change its value, and lets you multiply it as a fraction 8 x 360 12 1 Slide 28: Sector size for coffee 8 x 360 12 1 2 x 360 3 1 Reduce 8/12 to its lowest terms – 2/3 Either do 360 x 2 and divide by 3 Or divide the 360 first by 3 then double it = 240 degrees Boxing clever : Boxing clever Some people always work out the basic sector first and then multiply up from that We know 1/12 prefer tea = 30 degrees Coffee is 8/12 – so that will be 8 x 30! Now let’s see the “other” category Sector size for “other” : Sector size for “other” 3/12 prefer “other” We know 1/12 = 30 degrees So 3/12 will be 90 degrees (90°) Also, 3/12 = ¼ , and a quarter of a circle is 90° Looks like this… : Looks like this… Class task : Class task Construct a pie chart for the members of the class in a similar manner. When completed use excel to construct a pie chart using the data from the class. You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.
pie charts whitesnake666 Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT lite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 235 Category: Education License: All Rights Reserved Like it (0) Dislike it (0) Added: August 12, 2010 This Presentation is Public Favorites: 0 Presentation Description pie charts Comments Posting comment... Premium member Presentation Transcript Feeling hungry? : Feeling hungry? Have a slice of pie ;) Pie charts : Pie charts Pie charts….. : Pie charts….. Let us see a set of data very easily Without using numbers Here’s one now…… Every pie chart has… : Every pie chart has… A title A key Sectors These follow…. Slide 7: Title Slide 8: A key Slide 9: Sectors More pie charts : More pie charts Now let’s try a real one : Now let’s try a real one Do a survey of the group and whether people prefer tea, coffee or neither, using the tally method Let’s see what that looks like as a pie chart End E3 here Constructing a chart : Constructing a chart Doing the Maths bit… Back to the Babylonians : Back to the Babylonians They divided a circle into 360 degrees This matched the number of days in a year very closely It is also a number with many factors, so it is easy to divide down and calculate with, without getting into fractions ;) Check out the factors of 360 : Check out the factors of 360 On your own or in pairs, work out as many factors of 360 as you can Answers follow… Factors of 360 : Factors of 360 1 2 3 4 5 6 8 Factors of 360 : Factors of 360 9 10 12 15 18 20 30 Factors of 360 : Factors of 360 36 40 45 60 72 90 120 180 Working out the angles… : Working out the angles… Let’s imagine we do a survey of 12 people to find out whether they prefer tea, coffee, or some other drink Let’s say there is 1 who prefers tea, 8 coffee and 3 some other drink… Working it out…. : Working it out…. Then 1 in 12 prefer tea 8 out of 12 prefer coffee 3 out of 12 prefer “other” drinks Changing the English to Maths : Changing the English to Maths 1 in 12 for tea = 1/12 8 out of 12 for coffee = 8/12 3 out of 12 for “other” = 3/12 Calculating the angles : Calculating the angles 1 tea out of 12 8 coffee out of 12 3 “other” out of 12 Tea sector = 1/12 x 360 Coffee = 8/12 x 360 “Other” = 3/12 x 360 Do the Maths….for tea : Do the Maths….for tea 1 x 360 12 You can put any number over 1 - this doesn’t change its value, and lets you multiply it as a fraction 1 x 360 12 1 Sector size for tea : Sector size for tea 1 x 360 12 1 1 x 360 = 360 360 divided by 12 = 30 So the sector for tea will be 30 degrees wide Slide 27: Do the Maths….for coffee 8 x 360 12 You can put any number over 1 - this doesn’t change its value, and lets you multiply it as a fraction 8 x 360 12 1 Slide 28: Sector size for coffee 8 x 360 12 1 2 x 360 3 1 Reduce 8/12 to its lowest terms – 2/3 Either do 360 x 2 and divide by 3 Or divide the 360 first by 3 then double it = 240 degrees Boxing clever : Boxing clever Some people always work out the basic sector first and then multiply up from that We know 1/12 prefer tea = 30 degrees Coffee is 8/12 – so that will be 8 x 30! Now let’s see the “other” category Sector size for “other” : Sector size for “other” 3/12 prefer “other” We know 1/12 = 30 degrees So 3/12 will be 90 degrees (90°) Also, 3/12 = ¼ , and a quarter of a circle is 90° Looks like this… : Looks like this… Class task : Class task Construct a pie chart for the members of the class in a similar manner. When completed use excel to construct a pie chart using the data from the class.