I need to make the following image in Photoshop cs6
What I did is made two circles, one with light green color the second with dark green color as:
Then I covered light circle with the darker circle. After that I drew a quadrilateral with the Lasso tool. Then I selected the quadrilateral with Quick selection tool and deleted that portion of the darker circle. The problem is that the quick selection tool doesn't cut area with smooth boundaries. The sides of quadrilateral are pixelated. So,
Is there any way to cut custom shape from an image/layer in Photoshop with smooth boundaries?