Converting Radians to Degrees

gistfile1.m

 #define RADIANS_TO_DEGREES(__ANGLE__) ((__ANGLE__) * 57.29577951f) // PI * 180

-(float32) getRotatingAngle : (CGPoint)firstPoint secondPoint:(CGPoint)secondPoint
{
 float dx = firstPoint.x - secondPoint.x;
 float dy = firstPoint.y - secondPoint.y;
 float angle = RADIANS_TO_DEGREES(atan2(dy, dx));
 return angle;
}