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.
Interior Angles The sum of the measures of the interior angles of a triangle is 180 degrees. Since all the sides of equilateral triangles are the same length, all the angles are the same... The interior angles of an equilateral triangle are all 60 degrees.