What is a “sacred” number?
While there may be certain numbers of importance and significance and I don’t think there is such a thing as a sacred number.
It’s when a number (or anything else at that matter) is associated with the reverence and worship of the Triune God as opposed to just number crunching int the checkbook. For example, the times of silence during the Mass is referred to as “sacred silence”. These moments are used for meditation of something that has recently occurred, to worship, pray, etc. It’s differentiated between just being silent elsewhere.
So it’s separating something from the ordinary to use for the glory of God in some manner.
The reason I ask about the angles/geometry is for it to be used as a guide in meditation. For example, the number 5 is sacred to me when I meditate on the wounds of Christ and how I may further my understanding and devotion to Reconciliation and taking the Gospel to others. Sometimes it’s done with a “crusader’s cross” which consists of a large cross surrounded by four smaller ones.
Otherwise, the number 5 just may be how much I spent at the grocery store. Nothing out of the ordinary.
So numbers and symbols, turn me to prayer and Jesus’ commands to be holy. The more numbers, symbols, and shapes I see as sacred, the more I will see in everyday life as “signposts” of God’s Will, to pray, to fast, and other necessities.
So that’s it. Numbers and symbols may not be sacred to some, but to me I find that it’s becoming impossible for them not to be.