How do I find a geometry book with a proof of nine points circle ?

chanljkk: How do I find a geometry book with a proof of nine points circle ?
Three points of mid-point of each side of a triangle, three points of perpendiculars intercepts with opposite sides,
three points of angle bisectors intercepts with the opposite sides, all together 9 points form a circle.
It was in geometry text books of high school in Asian countries.
Thanks. Mathsoc. You have a mathematics mind.

Answers and Views:

Answer by Mathsorcerer
It was in my geometry book in high school and then again in university. I don’t have my books with me at work–obviously–but here is a link for the 9-point circle:

https://mathworld.wolfram.com/Nine-PointCircle.html