Click the image for full size. You have to see it full size.
1. What questions perplex you about this photo?
What’s the perplexity score here?
davidwees: How many people there?
Peter: how many people are there?
Roz: How many people?
schwartz: is it bad that i want to know the area of the shaded regoin?
JG: How many rows can be added until the circle touches the pentagon?
Colin (@ColinTGraham): How was it built and measured out?
Sam Critchlow: what/why is the gap between the pentagon and the circle
JG: How much area is added on with each additional concentric circle?
Sam Critchlow: or what is the total open space area
Chris: how many more people to complete the circle?
Colin (@ColinTGraham): what’s the significance of the pentagon
Nick Hussain: how many more people/dwellings (?) could be added if the circle was completed?
JSR: what’s at the center?
Colin (@ColinTGraham): how many sectors if the circle was complete
We went with:
davidwees: How many people are there?
2. What is your guess? What is a number you know is too high / too low?
3. What information would you need to answer the question?
JG: Average number of people in each rectangular region
schwartz: people per square something
davidwees: I think we can estimate people per square
schwartz: radius of part circle?
Barb: Was admission charged? If so, who sold the tickets? They could give a ballpark figure
Colin (@ColinTGraham): is each sector evenly divided and how many sit in each of the eleven concentric rings?
davidwees: and get the scale from the size of the tracks shown
Roz: we definitely need scale
David’s response is right on point:
davidwees: so I think we could get a pretty good estimate without much more information
You don’t need anything more here. (I wonder what it takes to get students comfortable with imaginary units, as in “the radius of the circle is 500 burningmans,” etc.)
Nevertheless, here are two images that are interesting, if not useful also:
4. Submit your work.
5. Show the answer.
[BTW: Though the photo is clearly timestamped 2009, various commenters have outed themselves as serious Burning Man attendees to tell me that this is 2010’s photo. I have adjusted the news clipping accordingly.]
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