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22 Feb 2005
A new trigonometry challenge: Given a hexagon inscribed in a square as shown below, what is the
ratio ofrelationship between the length of segment a and segment b? Assume the hexagon's sides are all of equal length.
Update Feb 26: The solution, props to Brian.
Chris says:
Since it’s an equilateral hexagon, you know the inside angles are 120° each. Knowing that, we can find the interior angles of the right triangles (180° - 120° = 60° and 180° - (90° + 60°) = 30°).
tangent(q) = b / a
so
tan(30°) = 0.57
right?
Chris says:
oh, ratio is 1:0.57
Logan says:
It’s not a regular hexagon. It’s very slightly off-regular. A regular hexagon is longer point-to-opposite-point than edge-to-opposite-edge.
nomad says:
In other words: the edges don’t touch the square? what touches the square exactly?
Logan says:
The two side edges and the top and bottom points do touch the square. Thus, the hexagon does not have all equal angles, but does have all equal edges. It’s essentially a regular hexagon that has been squeezed top-to-bottom slightly.
Chris says:
What is this problem based on? Is there a real-life application?
Logan says:
No. My brain pooped it out yesterday while I was in a meeting.
Brian says:
This is a strange problem. It took me a while to get the answer for some reason, but I ended up getting a solution. I’m not sure if I should post it here or not. I’m not even sure if it’s right. Anyway, good question Logan, I had fun.
bobba says:
this web site sucks