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.
Step 5: Construct the sides of the equilateral triangle by connecting the endpoints of three consecutive 120Â° arcs. Method 2: Use the endpoints of a diameter to construct an equilateral triangle inscribed in a circle. Step 1: Use the given center and the straightedge to construct a diameter of the circle.