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Member for
4 ปี 1 เดือนAge: 10-11
Level: 1. stupeň
Language: Czech
(cs)
ไอดี: 651771
21/01/2021
Country code: CZ
Country: Czechia
Main content: Obvod čtverce, opak. obvodu trojúhelníku (1252108)
From worksheet author:
Vzorce pro obvod
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