Blood Type Compatibility. Your ABO blood type is based on the presence or absence of the A and B antigens on your red blood cells. The A blood type has only the A antigen and the B blood type has only the B antigen. The AB blood type has both A and B antigens, and the O blood type has neither A nor B antigen.
Green Triangle. The green triangle appears in the upper left hand corner of a cell when there is an error in a formula. Sometimes Excel will report an error when you use text in a box and the program believes it is part of a formula. When you click on the green triangle there will be a yellow box that looks like a road sign with an exclamation point in it. This button is the Trace Error option that will help you correct your formula.
If you do not want to create a symmetrical box, but want each corner to have different curvatures, the easiest way to do this is to use the following (self-explanatory) properties: 1  border-top-left-radius. 2  border-top-right-radius.3  border-bottom-left-radius. 4  border-bottom-right-radius.he CSS rule creating the above rounded corner effect is as follows: border-radius: 20px; As radius suggests, CSS imagines that the curve is part of an ellipse, that is, an oval or a circle. Since I only provided one value above, the browser draws a circular arc with a radius of 20 pixels for each corner of the box.