Number added to a code (such as a bar code or account number) to derive a further number as a means of verifying the accuracy or validity of the code as it is printed or transmitted.
An equilateral triangle has the following properties. 1  Equilateral triangles have three equal side lengths. 2  Equilateral triangles also have three equal angles of 60 degrees. 3  They also have three equal altitudes.  Is the height of an equilateral triangle equal to its side 1  length. The height is equal to side/2 x  â3.
The two angles touching the base (which are congruent, or equal) are called base angles. The angle between the two legs is called the vertex angle. Equilateral triangles. An equilateral triangle has three equal sides and three equal angles (which are each 60Â°). Its equal angles make it equiangular as well as equilateral.