The interesting cosmic geometry of the following identity is described below.
This identity allows us to unite the geometry of the circle, square and rectangle.
We start off by constructing the squares. (grey area = 4ab)

And next we add the circles as shown below.

Then we construct the blue 3-4-5 triangle. (2√(ab) = a for this example only)

The grey areas are equal.

Construct the green triangle and scale the geometry by 1/b. (assume a/b > 1)

This method uses the theorem of geometry called the power of a point.

And next another example using the trusty blue 3-4-5 triangle.

The geometry of both examples shown below. (3-4-5 triangle always in blue)

The geometry of the circle.

The grey areas are always equal. (for all y)

The next example is different.

It requires another step.

We can connect the blue and olive green triangles.

The above method can be found in the geometry of both kinds folding fish.

Sophisticated Geometry/Algebra Ahead!
All of this geometry is directly related to the blue 3-4-5 triangle and the following values (TAN/COS/SIN) are used as variables. Yes it is extremely sophisticated.

This is difficult to understand but it is so we can track the trig values from the 3-4-5 triangle to see how they propagate through the geometric universe.
The relationship between the two y and x values. These equalities are equivalent.

Below shows the fundamental triangles all directly related to the 3-4-5 triangle.

As shown above the green triangles (y values) are related to the COS/SIN values from the 3-4-5 triangle. The red triangles (x values) are related to the TAN value.
Seven being a lucky number as we have two triangles related to the x value. (x=7)

I have found two different folding fish. (square based and non-square based)
Named simply because they look like fish and they fold into a solid.

The (square based) fish live inside the well known square-root spiral while the (non-square based) fish live inside the whole number spiral. The whole number spiral has two triangles for every triangle in the square-root spiral or spiral of Theodorus.

When I say they live in the spirals I mean the conceptual roots of each fish can be found inside the two spirals and they are good ways to understand the folding fish.

These folding fish can be connected together being parts of the spiral geometry.

This nearly completes the study of the 3-4-5 triangle and its connected geometry.
“From this point onwards, things get a little bit confusing.” This cosmic (±) geometry method is mind bending and over the top on sophistication. I have been studying it for many years and if anybody is reading this, please don’t break your brain.

It takes ten years to become a master of anything and when learning geometry, remember it takes time to ‘digest’ knowledge and turn it into understanding.
I started looking at the geometry of the 3-4-5 triangle thinking it would be easy and quick and slowly found out it is secretly connected to everything (foundation stone).

Used by all ancient civilizations to construct a right-angle and famously the middle pyramid at the Giza plateau. The 3-4-5 triangle has a lot of sacred geometry to teach and shows us what we need to know to understand the great pyramid.

Joining the great pyramid and pentagon. (non-square based fish fragments)

The geometric treasure that is the golden ratio (phi) is found all the plateau but extensively in the kings chamber. In the queens chamber we find the hexagon.
Above is a comparison between the hexagon and pentagon triangles. Below shows how the geometry of the pentagon is also linked to the 3-4-5 triangle.

And next we have the intriguing geometry of the corner stone.

Being parts of the elaborate geometry of the simple square or sacred cross.
























































































































































































































