The Base Length of Polygram is the length of the unequal side of the isosceles triangle which forms as the spikes of the Polygram or the side length of the polygon of Polygram. And is denoted by lBase. Base Length of Polygram is usually measured using the Meter for Length. Note that the value of Base Length of Polygram is always positive. Typically, the value of Base Length of Polygram is greater than 0.