perplexus.info :: Just Math : Inradius and Perimeter

Inradius and Perimeter (Posted on 2008-02-26)

Show that a triangle's perimeter is more than 10 times the radius of its incircle.

Submitted by Praneeth

Rating: 4.0000 (2 votes)

Solution: (Hide)

Thanks to Charlie for suggesting a better inequality.
Here is the solution by Daniel

Comments: ( You must be logged in to post comments.)

Subject	Author	Date
a solution	Dennis	2008-02-26 14:33:10
re: computer exploration -- not proof -- spoiler -- finer grid	Charlie	2008-02-26 12:27:11
computer exploration -- not proof -- spoiler	Charlie	2008-02-26 12:17:43

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