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Pi day 2021 / Semicircle 半円 Mystery Cache

Hidden : 3/3/2021
Difficulty:
2 out of 5
Terrain:
1.5 out of 5

Size: Size:   micro (micro)

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Geocache Description:


March 14 is Pi day, an annual celebration of the mathematical constant π (pi). To celebrate this day, this cache on circle has been hidden. There is a building with a semi-circular roof, but the cache is not hidden at the listed coordinates.

A semicircle with a radius of 5cm is divided into five parts, S, T, U, V, and W, by four straight lines. Points C, D, and E in the figure are points that divide the diameter AB into four equal parts. The size of each of the four ●-marked corners is 45 degrees. Assuming pi = 3.14, the area of ​​S is a.bcd (cm^2), and the sum of the areas of T and V minus the sum of the areas of U and W gives e.fg (cm^2).


Actual cache coordinates:
N 35 40.(b+c)(a-e)(a-b)
E 139 45.(a-d)(f-b)(g-b)

Please bring your own pen.

===== Japanese =====

3月14日は「円周率の日」です。この日を記念し、円に関するミステリーキャッシュを設置しました。公開座標には屋根が半円形のビルがありますが、キャッシュはありません。

半径5cmの半円を4つの直線によってS、T、U、V、Wの5つの部分に分けます。図の点C、D、Eは直径ABを4等分する点です。●印がついた4つの角の大きさはいずれも45度です。円周率を3.14とすると、Sの面積はa.bcd (cm^2)、TとVの面積の和からUとWの面積の和を引くと、e.fg (cm^2)となります。


キャッシュは以下の座標にあります。
N 35 40.(b+c)(a-e)(a-b)
E 139 45.(a-d)(f-b)(g-b)

キャッシュにはペンが入っていませんのでお持ちください。


You can validate your puzzle solution with certitude.

Additional Hints (Decrypt)

zntarg

Decryption Key

A|B|C|D|E|F|G|H|I|J|K|L|M
-------------------------
N|O|P|Q|R|S|T|U|V|W|X|Y|Z

(letter above equals below, and vice versa)