Triangle their internal angles, measured here in degrees. A triangle that has two angles with the same measure also has two sides with the same length, and therefore it is an isosceles triangle. It follows that in a triangle where all angles have the same measure, all three sides have the same length, and such a triangle is therefore equilateral. Triangles are assumed to be two-dimensional plane figures, unless the context provides otherwise (see Non-planar triangles, below). In rigorous treatments, a triangle is therefore called a "2-simplex" (see also Polytope). Elementary facts about triangles were presented by Euclid in books 1–4
The Three Degrees (album) "Dirty Ol' Man", a #1 hit single in the Netherlands, "Year Of Decision" and the UK #1, "When Will I See You Again". The album charted at #11 on the UK album chart. The album was re-issued on CD in 2010, for the first time in the UK, by Big Break Records. This re-issue includes three bonus tracks including a 1977 remix of "Dirty Ol' Man" by Tom Moulton. with: The Three Degrees (album) The Three Degrees is a 1973 studio album released by girl group The Three Degrees. Since their formation in 1963 until 1969, The Three Degrees had