The Shri Yantra or Sri Chakra of Tripura Sundari is a yantra or mandala formed by nine interlocking triangles surrounding a dot in the cetner called a bindu. Four of these triangles are orientated upright representing Shiva or the Masculine. Five of these triangles are inverted triangles represent Shakti or the Feminine. Because it is composed of nine triangles, it is also known as the "navayoni chakra".