What is a Triangle?. The length of the sides can vary, but the length of the largest side can't be greater than or equal to the sum of the other two sides. In addition, a triangle has three interior angles, and the sum of those three angles is always 180°.   
 What!is!a!Triangle?!! !This means triangles are two-dimensional shapes and are closed. Many children do not think a shape is a triangle unless it has three equal sides and sits on a.   
 Triangle formulae - MathcentreA triangle is a polygon with three sides and edges. It is one of the basic shapes in geometry. Based on Euclidean's geometry, the sum of the angles of a ...   
 TriAngle - triopticsSkylar: Every triangle has key characteristics. A triangle must have three straight sides. See, one, two, three! And the sides must ...   
 | TRIANGLE - Grover Pro PercussionA triangle with six pieces of information: angles at A, B, and C; sides a, b ... It is impossible to draw a unique triangle given one angle and two side lengths.   
 of a triangle always add up to 180?.This is usually referred to as the Bermuda Triangle, where more than 1,000 lives have been lost in the past 26 years, without a single body or even a piece of ...   
 Triangle ProofsPlane geometry is all about flat 2D, or two-dimensional, shapes that can be drawn on a piece of paper, like lines, circles, triangles, squares, and rectangles.