Love Triangles (Adieu to Hypoten-You)

I know that a² + b² = c²
But I'm afraid you² + me² ≠ we²
You took the us out of Pythagoras [paɪˈθæɡ.əɹ.əs]
So I turned 90° and walked away
I had to say

Adieu to hypoten-you
I've forgotten you
We were one whole polygon
But we got chopped in two
Goodbye to the function of u + i
You were my cosine
But love triangles never work
There's one too many sides
Love triangles never wooooooork

I know that π's digits are never-ending
But you and I hit our limit, let's stop pretending
You never let us be equilateral
I was always secant, so I walked away
I had to say

Chorus

Love triangles never wooooooork
Someone always ends up hurt
We'll never be like what we were
(x2)
(tender ending)