RWLongy4 wrote:well, triangles have a 3-4-5 rule. If the two sides are multiples of 3 and 4 the hypotonuse is the same multiple of 5.
Actually, Geometry makers use a number of lengths when making triangles like that. The most common or the 3, 4, 5(shown) and a 9, 12, 13. More often than not, the triangle will be that or that multiplied.