День числа Пі

 https://docs.google.com/presentation/d/1ZIKkuyDscrnquplqI4_CDMnGHQLVOmop/edit?usp=share_link&ouid=107733634231368606346&rtpof=true&sd=true

https://docs.google.com/presentation/d/1TOeSlfVXQMqmU5uXpvVBtx2fk7E9WO4G/edit?usp=share_link&ouid=107733634231368606346&rtpof=true&sd=true

https://docs.google.com/presentation/d/1Wt42NehtbasRv_9F8nnZnWPUr2vxmgZs/edit?usp=share_link&ouid=107733634231368606346&rtpof=true&sd=true