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.
An equilateral triangle is isosceles because it has three equal sides and an isosceles must have two, which an equilateral does. However, an isosceles has 2 equal sides and therefore is not an equilateral because an equilateral must have 3 equal sides. Simply: an equilateral triangle is an isosceles triangle because 3 is greater than or equal to 2 and an isosceles triangle is not an equilateral triangle because 2 is not greater than or equal to 3. Hope this helps.