In the ordinary throw the angle of the elbow is about 90 degrees.
For right-handed shooters the left foot is in front pointing straightforward and the shooter stands in a broad-standing position.
The right foot is pointing outward causing the body to turn the side against the direction of the shot.

When the throw is performed a lot of things happen.
The weight is shifted to the left foot and at the same time the hip is turned forward.
This causes the shoulder to turn forward and the ball is pressed forward.
Now the forearm is flicked forward and the wrist is bend backwards.
At last the wrist is pressed forward and the 3 middle fingers gives the ball the last push forward.
The little finger and the thumb are used to direct the ball.