geometry - Convert a direction into an angle on our compass

I have a new position vector and old x and z coordinates and I need to determine the angle traveled. So far I am getting the slopes absolute value and then using that to generate an angle. Based on

geometry - Angle points calculation - Mathematics Stack Exchange

Trigonometric Applications in Real Life

Geometry: How do you bisect an angle? - Quora

Lesson Explainer: Rotations about a Point

1a A fixed compass. One leg has a needle that is placed at the

How to Draw a Compass Rose: 12 Steps (with Pictures) - wikiHow

I made a visual guide for my Mirror compass technique : r/geoguessr

Precalculus B Lesson 6.1 Bearing vs Direction Angle

Getting to the Point - Lesson - TeachEngineering

Vector Angle Conversion – GeoGebra

Geometry: How do you bisect an angle? - Quora

Resultant as Magnitude and Direction

Direction magnet hi-res stock photography and images - Alamy

Turns and Angles Year 3 Properties of Shape Free Resource Pack