Rahmi, YuliaHasriatiNatsir, M.2014-03-252014-03-252014-03-25Rangga Dwijunanda Putrahttp://repository.unri.ac.id/xmlui/handle/123456789/5886This paper discusses how to determine the length of excentral triangle sides through the relation of the excentral triangle sides and original triangle sides. Ratio between the excentral triangle area and original triangle area can be obtained by Heron formula. In addition, the paper also discusses how to obtain the comparison between the radius of incircle and radius of circumcirlcle of excentral triangle and original triangleothercolliniercomparation of areacomparation of incircle radiuscomparationof circumcircle radiusexcentral triangleOther