Indicator base b ''. It is a side parallel to the main indicator and joining the extreme opposite points of the secondary indicators, has a length and a b value equal to 1,2,3...b times the length of the sides of the broken lines, if and only if, the orderly concave polygon is divided into squares or diamonds in congruent, and if the ordered concave polygon is divided into rectangles or congruent rhomboid , then the value b is equal to 1,2,3...b times of the two lengths of the sides of the broken lines.
* Only one "like" per meaning and day, the more "likes" the meaning will appear higher in the list
