question: public boolean isOnPieChart ( Point screenPoint ) { double sqValue = ( Math . pow ( mCenterX - screenPoint . getX ( ) , 2 ) + Math . pow ( mCenterY - screenPoint . getY ( ) , 2 ) ) ; double radiusSquared = mPieChartRadius * mPieChartRadius ; boolean isOnPieChart = sqValue <= radiusSquared ; return isOnPieChart ; }
target:  Checks if Point falls within PieChart