The triangle of manifestation from witches is a phase that indicates the principle of magical manifestation.
This basic principle is rooted in the number of three. It is a metaphysical belief that to manifest something, three components must come together. These components are time, space, and energy.
The functioning of the components is such that if a time and a space are selected into which energy is directed, a manifestation will occur.
A convenient method of directing the energy is through a triangle formed with both hands by placing the tips of the index fingers together while placing both thumbs together with all other fingers extended. This symbolic hand gesture may be employed in a ritual, chanting, or charging an object. A.G.H.
Source: 78, 375-376.