Question

12 out of 30 people chose their favourite colour as blue calculate the angle you would use for blue on a pie chart

Answer 1

First, I'll calculate the percentage:


`(12)/(30) *100%= (12*100)/(30) = (120)/(3) =40`

so it was 40 % of people that chose blue

And now we can calculate the angle;


the full chart would have 360 Degrees, and the "blue" portion of the chart would have 40 % od 360 or
`(40*360)/(100) =4*36=120+24=144`


so the angle would be 144 degrees!