Thanks for this memory sheet, very useful!

However I believe some formulas, details might be added...

Angles of a polygons (n-2)* 180, angles inscribed in a circle (compared to central angle there a section about it in the

VERITAS Prep book)

Also I did not see two real IMPORTANT triangles sides ratio:

3:4:5

5:12:13

Good you put the formula for the equilateral triangle (which is not given in the OG and allow you to gain so much time)

I found formula I did not know!

Thank you for sharing