Check out example codes for "random position in a circle unity". It will help you in understanding the concepts better.

Code Example 1

using UnityEngine;public class ScriptExample : MonoBehaviour
    void Start()
        // Sets the position to be somewhere inside a circle
        // with radius 5 and the center at zero. Note that
        // assigning a Vector2 to a Vector3 is fine - it will
        // just set the X and Y values.
        transform.position = Random.insideUnitCircle * 5;

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