What is Sacred Geometry? It is the Divine Love and Light that connects and supports all of creation.

A great introduction is found here:

https://www.crystalinks.com/sg.html

There are plenty of items to research: Golden ratios, Fibonacci sequence (interesting that 144 is one of those numbers which corresponds with the 144,000 mentioned in sacred texts).

Examples of Sacred Geometry:

Spirals:

Sea shells

Snail shells

Spider webs

Pine cones

Tree trunks once cut (the rings)

Our ears

Our fingerprints

Hurricanes/Tornadoes/Typhoons

Galaxies

Pyramids/Triangles:

Our noses

Mountains

Ice crystals (Snowflakes)

Trees have a pyramid shape (small branches on top, big branches on bottom)

Grid lines on Earth

Diamonds:

Our eyes

Our mouths

Our hands

Our feet

Our whole body shape (head to feet = diamond)

Ice crystals (Snowflakes)

Hexagons:

honey combs

turtle shells

Spheres:

Earth, Sun, Moon, Planets

Search your favorite shape in nature in an images search in a search engine and you may be surprised about the oneness and interconnection of life. 

Examples:

Photo above from https://tumamocsketchbook.com/2021/05/what-is-the-golden-spiral-to-understand-it-we-need-to-draw-it.html