How to draw exactly 1/3 circle in Photoshop?

I need to do a pie chart with exact 1/3 chunks. Obviously it’s easy to do a quarter circle – just cut the circle in half and then cut that half in half. But how would I do 1/3 circle?


  1. Create an origin with guides, turn on snapping.
  2. Choose the polygon tool, draw a 3 sided shape (i.e. equilateral triangle) centred at the origin
  3. Choose the ellipse tool, draw a circle also centred at the origin with a radius intersecting the triangle.

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Source : Link , Question Author : Ryan , Answer Author : jontyc

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