It is the sum of the y-coordinates of the vertices divided by the number of vertices.
The abscissa is 8.
d/3 (1st coordinate + last coordinate) + (4*sum of even coordinates) + (2*sum of odd coordinates)
The total sum of angles around a point are 360 degrees.
The sum of current approaching a point is equal to the sum of current leaving the same point.
Draw any straight line through the point. The sum of the angles at the point are the sums of the angles on each side of the line - which are known to be 180o. Thus: the sum of the angles at the point = the sum of the angles of each side of the line = 180o + 180o = 360o The sum of the a
for an object in equilibrium, the sum of clockwise moments about any point equals the sum of anticlockwise moments about the some point.
sum up the mean point
Count the lengths of each side and sum them up (add them all together.)
Zero: A compound must be electrically neutral. This corresponds to an equal number of positive and of negative oxidation numbers.
You type an equals sign into the formula box, type in the sum you want to do using the cell references (coordinates) then click enter