Difference between revisions of "1973 IMO Problems/Problem 4"

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==Problem==
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A soldier needs to check on the presence of mines in a region having the
 
A soldier needs to check on the presence of mines in a region having the
 
shape of an equilateral triangle. The radius of action of his detector is equal
 
shape of an equilateral triangle. The radius of action of his detector is equal
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triangle. What path shouid he follow in order to travel the least possible
 
triangle. What path shouid he follow in order to travel the least possible
 
distance and still accomplish his mission?
 
distance and still accomplish his mission?
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==Solution==
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The discussion thread for this problem is here: [https://aops.com/community/p1141601]
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{{solution}}
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== See Also == {{IMO box|year=1973|num-b=3|num-a=5}}

Revision as of 14:50, 29 January 2021

Problem

A soldier needs to check on the presence of mines in a region having the shape of an equilateral triangle. The radius of action of his detector is equal to half the altitude of the triangle. The soldier leaves from one vertex of the triangle. What path shouid he follow in order to travel the least possible distance and still accomplish his mission?

Solution

The discussion thread for this problem is here: [1]

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See Also

1973 IMO (Problems) • Resources
Preceded by
Problem 3
1 2 3 4 5 6 Followed by
Problem 5
All IMO Problems and Solutions