struggling with the math

This may be a little difficult to explain, I have a ring of square sprites which I would like to expand outwards while keeping a uniform distance between sprites and scaling them up from 0.5 (inner most ring) to 1 (outer most ring). I'm not really that good with maths just yet so, any help on achieving this would be greatly received.

 using UnityEngine;
 using System.Collections;
 
 public class test : MonoBehaviour {
 
     GameObject areaGo;
     GameObject areaSprite;
 
     public Sprite sprite;
 
     int areaAmount = 120;
     int layerAmount = 10;
 
     float angle = 0f;
     float angleOffset = 3f;
     float intialPosition = 10f;
     float initialScale = 0.5f;
 
     void Start () {
 
 
 
         for (int i_layer = 0; i_layer < layerAmount; i_layer++)
         {
             for (int i_area = 0; i_area < areaAmount; i_area++)
             {
                 areaGo = new GameObject();
                 areaGo.name = "area_" + i_area;
 
                 areaSprite = new GameObject();
                 areaSprite.name = "areaSprite_" + i_area;
 
                 areaSprite.transform.parent = areaGo.transform;
                 areaSprite.AddComponent<SpriteRenderer>().sprite = sprite;
                 areaSprite.AddComponent<BoxCollider2D>();
 
 
 
                 areaSprite.transform.position = new Vector3(0f, intialPosition, 0f);
                 areaSprite.transform.localScale = new Vector3(initialScale, initialScale, 0f);
 
 
 
                 angle = +angleOffset * i_area;
                 areaGo.transform.Rotate(0f, 0f, angle);
 
                 Debug.Log(angleOffset);
             }
 
             intialPosition += 0.55f;
             // initialScale += 0.005f;
         }
 
     }
     
 }