# Arbelos' Morsels

### A Pleasant Fact

Assume $B'C=BC\;$ and that all the curves that appear in the diagrams below are semicircles.

Then in each diagram the areas of different colors are equal.

### Proof

The proof is left as an exercise.

### Acknowledgment

I am grateful to Teo López Puccio from Argentina for sharing his observation of this configuration related to the famous arbelos.