Petya goes to Vasya using shortest route (2017 Novosibirsk Oral Geo Oly 8-9 p1)
Source:
April 26, 2021
geometrygridmin
Problem Statement
Petya and Vasya live in neighboring houses (see the plan in the figure). Vasya lives in the fourth entrance. It is known that Petya runs to Vasya by the shortest route (it is not necessary walking along the sides of the cells) and it does not matter from which side he runs around his house. Determine in which entrance he lives Petya .
https://cdn.artofproblemsolving.com/attachments/b/1/741120341a54527b179e95680aaf1c4b98ff84.png