The regular version of this shape has interior angles that measure three times as large as its central angle, which means that an interior angle also measures three times an exterior angle.
This shape can be graphed by setting the sums of multiples of the absolute values of x\+ y, x– y, x, and y equal to a constant. Six of these figures combine with eight triangles to form the surface of a truncated cube, and placing two of these shapes and a square at each vertex tessellates the plane. The regular version of this shape has interior angles that measure three times as large as its central angle, which means that an interior angle also measures three times an exterior angle. A convex version of this shape has a total of 20 diagonals, and each vertex is the endpoint of five of them. Name this polygon with eight sides.
This shape can be graphed by setting the sums of multiples of the absolute values of x\+ y, x–
octagon