Question 66276
wHAT ARE THE STEPS TO DRAWING A PIE CHART.....HOW DO YOU DRAW A PIE CHART OR CONSTRUCT A PIE CHART CAN YOU EXPLAIN THE STEPS
LET US TAKE THE FOLLOWING DATA ON GRADES OBTAINED BY STUDENTS IN A CLASS 
A = 50
 B= 100
C=50
TOTAL=200
MAKE A TABLE OF % .
A = 50*100/200=25
B=100*100/200=50
C=50*100/200=25
TOTAL = 100
NOW TAKING TOTAL AS 360 DEGREES CONVERT THE ABOVE PERCENTAGES IN TO DEGREES  
A=360*25/100=90
B=360*50/100=180
C=360*25/100=90
TOTAL = 360 DEGREES.
NOW DRAW ANY CIRCLE TAKING A CONVENIENT RADIUS WITH O AS CENTER .
DRAW ANY LINE OP SAY WITH P ON THE CIRCUMFERENCE OF THE CIRCLE.SUPPOSE WE DRAW
IT HORIZONTALLY.
NOW TO SHOW A GRADE FROM OP MEASURE AT 'O' 90 DEGREES CORRESPONDING TO 90 DEGREES WE GOT FOR 'A' GRADE STUDENTS.. TO GET LINE OA WITH A ON CIRCUMFERENCE,SUCH THAT ANGLE AOP=90 DEG.
NOW TO SHOW B GRADE FROM OA MEASURE AT 'O' 180 DEGREES CORRESPONDING TO 180 DEGREES WE GOT FOR 'B' GRADE STUDENTS.. TO GET LINE OB WITH B ON CIRCUMFERENCE,SUCH THAT ANGLE AOB=180 DEG.
NOW TO SHOW C GRADE FROM OB MEASURE AT 'O' 90 DEGREES CORRESPONDING TO 90 DEGREES WE GOT FOR 'C' GRADE STUDENTS.. TO GET LINE OC WITH C ON CIRCUMFERENCE,SUCH THAT ANGLE BOC=90 DEG.
WHEN IT IS THE END OF PLOT , YOU WILL NOTICE THAT C COINCIDES WITH 'P'.
IF NOT ,EITHER PLOTTING IS NOT COMPLETE OR YOUR CALCULATION IS WRONG.
see the drawing below.
now shade different zones IN DIFFERENT COLORS OR HATCHING
POA , LABELING IT AS A GRADE
AOB,LABELING IT AS B GRADE
AND FINALLY 
BOP(BOC...C COINCIDES WITH P),LABELING IT AS C GRADE
{{{drawing(600,600,-10,10,-10,10,red(circle(0,0,8)),locate(0,0,O),
red(line(0,0,8,0),locate(8,0,P),line(0,0,0,8),locate(0,8,A),
line(0,0,0,-8),locate(0,-8,B)))}}}