This time, I introduce the mathematics tablet at “Isaniwa” shrine in Ehime prefecture. It was dedicated to the shrine in 1937. Please see the picture below.
It is not too old.
The problem is secondary school maths level.
You might solve it easily. ☺✍
The problem is secondary school maths level.
You might solve it easily. ☺✍
The problem is like that:
See the left figure.
When the diameter of circumscribed circle (White) is given as D, Express the diameter of small circle (Red) in terms of D.
(The 4 yellow circles are congruity.)
When the diameter of circumscribed circle (White) is given as D, Express the diameter of small circle (Red) in terms of D.
(The 4 yellow circles are congruity.)
(I'll put the solution next time.)
The photo: http://www.wasan.earth.linkclub.com/ehime/isaniwa22.html
The reference: http://www.wasan.jp/index.html
I have study session in Maroondah area (Ringwood, Ringwood East) Vic, Australia. Please contact me by email or SMS if you are interested.