Something to lighten the mood

The original problem was solved way back, bucks bunny, i.e. the entire area in red is 21 point whatever.

Cal then set us to calculating the individual red areas, which proved challenging when it came to the two smaller red areas at bottom left and top right.

EDIT: However your solution to the original problem is elegant!
 
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but I will say that if I drew one line on the diagram it might set the train in motion.
For the section in the upper right, I have a feeling that line would be drawn from the upper right corner down to the low point of the first circle on the right creating an ability to measure that little section in the middle between the lines. Just don't know how to do it.
 
I think we can ALL AGREE the original problem has been solved!

Calculate the Red Area.

990319d1634223624-lighten-mood-squaring-circle-jpg


25 (4 - Pi) or 100 - 25Pi. 21.46018366... :worship:

For some reason some people have tried to solve a more difficult problem. 😕

Monsieur mcchambin, with all respect, has failed to satisfy me with his solution to the problem I state below in a multilingual picture. I persist that there is no exact algebraic solution. Since the Transcendentals outnumber the Algebraics by Infinity, I am confident in my chances here.

But am frequently wrong. 😱

Could AllenB be the dark horse that upsets all our calculations with his single drawn line? I await with interest.
 

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snip...I and mchambin have solved part 2 of the problem!
---snip

A Claim that can only be justified by exact references and peer-review, IMO.

So far you are looking a bit Woolly. 😱

Mathematics is an exact discipline! We don't build the future on wobbly foundations. Will the future inhabitants of Planet Earth refer to the Galu-mcchambin Theorem just like they will to Pythoagoras' Theorem? Enquiring minds want to know. 🙂

It's either right, or it isn't. Sorry to rant.
 

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I understand that members want to work this out for themselves.

Allen's diagram in post #1186 shows what I described in words.

Looking at the bottom left triangle (to the left of the vertical green line), we see that its area is made up of three parts.

Find the area of the middle part.
 
Below is Cal's First Problem. We can mark that solved.

Cal's Second Problem is also below in an equivalent form:

Okay, I have my answer.

EDIT: I checked with Presh Talwaker and was right but part two is to find the area of each of the red pieces.

I think we are all up to speed on this now. And I looked at AllenB's construction in #1186.

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But how does it help? I am still thinking this is an ellipse problem with no exact solution. 😕

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All this talk of isosceles triangles and (approximation) to 30 degrees and sines and arctans isn't lighting me up. No light bulb is coming on. I don't get it. 😀
 

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