Error in AoPs Sol.'s Vol. 1, Problem 298?

EFuzzy

In the fifth edition solutions manual, it uses the formula (a+b-c)/2 for the inradius of a right triangle, on an 8-13-17 triangle. But 8-13-17 triangles aren't right. Is this a typo?

**Posted:** Sun Jan 23, 2005 3:51 pm

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RC-7th

**Posted:** Sun Jan 23, 2005 5:03 pm

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Nothing in life is impossible,... except: Slamming a revolving door; Clapping with one hand; Striking a match against wet toilet paper; Swallowing while you're talking;

Ravi B

Yes, the book is right. EFuzzy, see Example 17-3.

**Posted:** Sun Jan 23, 2005 5:06 pm

EFuzzy

Oh OK, I somehow overlooked example 17-3. Blush

Thanks!

**Posted:** Sun Jan 23, 2005 7:23 pm

_________________
Go KSEG! Free Geometry!

http://www.mit.edu/~ibaran/kseg.html