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Category: | Math |

Submitted By: | offsky |

Fun: | (1.67) |

Difficulty: | (3.17) |

Find the radius of the inscribed and circumscribed circles for a triangle.

Show Answer |

Posted by speedyg1000 | 12/06/02 |

ok then... | |

Posted by Mogmatt16 | 11/19/03 |

dude, A teaser would have been nice. | |

Posted by canu | 07/13/04 |

Here we have a good example of the inadequacy of the present rating system for the teasers, which is by users choosing one of three levels. This one should be rated: "for those who have mastered at least High School geometry". The explanation of the answer is incomplete, and ought to have included a link to a relevant online geometry textbook. | |

Posted by Sane | 02/11/05 |

Boy was Braingle ever desperate in their first couple weeks of being open to teasers. :lol: | |

Posted by darthforman | 05/11/05 |

:-? | |

Posted by brianz | 06/08/05 |

Shouldn't it be Hero of Alexandria's Formula, not Heron? :-? | |

Posted by nkatha23 | 11/09/05 |

yeah........ :o | |

Posted by SPUTNIK2 | 01/25/06 |

that teaser scared me!! :o | |

Posted by chata | 01/26/06 |

all of the above!!! | |

Posted by lessthanjake789 | 01/29/06 |

hate to be a jerk, it says find the radius of the circle, right? well, it doesn't give us numbers, so we want it in variables right? how about "x", teaser done with. Reread the text to see what i mean. the answer is X | |

Posted by keveffect1 | 02/20/06 |

Yikes I'm a freshman in college as a math major and did't know how to solve that (never heard of the formula you used either) I think I'll get back to my studies..... :lol: | |

Posted by say2joe | 03/13/06 |

Needs a better description of terminology. For example, explanation of misc. variables. For the sake of brevity, it is obvious that some idiosyncracies were ignored by the author. Good intentions with it though! | |

Posted by redraptor50 | 03/18/06 |

:o Great teaser .....I think, but good one....brain now fried :lol: :D | |

Posted by Vigo95 | 04/05/06 |

what ? | |

Posted by mmmcla01 | 04/12/06 |

Really confusing.....still working on it....doesn't make much sense to me... :-? | |

Posted by Atypic4l | 05/11/06 |

I liked that problem. I must admit that I coudn't get the answer myself, but the explanation did make sense to me, a high school sophomore. I have only ever heard of Heron of Alexandria, not Hero. And a college student, let alone a math major, who is not familiar with Heron's formula is truly saddening. | |

Posted by udoboy | 06/14/06 |

Heron's formula and Hero's formula are the same thing. A = Ã¢Ë†Å¡s(s-a)(s-b)(s-c). It's not commonly taught for some reason. I had to stumble upon it when I went through every math book I could find in my college library. This teaser is hard, but the conclusion is correct. | |

Posted by jinzcarmela | 05/22/07 |

hey man your brain is too big!!! :lol: i thought that the answer will be a constant number... hahaha guess need to study more.... | |

Posted by nascarfan19 | 06/28/08 |

i thought you could only find the radius and circumfrence of a circle :o | |

Posted by dalfamnest | 10/11/09 |

If I want this sort of question I'll open my geometry text book. A worthwhile question in context but is it really a suitable Braingle Teaser? Oh well, I enjoyed working it out! :D :cry: :o | |

Posted by eighsse | 09/07/13 |

The answer to this teaser should be "Make me." |

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