Skin tags that have changed color or bleed may require your doctor's evaluation and reassurance. Rarely, thrombosed skin tags may be a sign of another condition and need to be biopsied.
The x-axis and y-axis are two lines that create the coordinate plane. The x-axis is a horizontal line and the y-axis is a vertical line. I'm sure you've heard that a million times, but it might hard for you to remember which one is which. Here is a little trick to help you remember...
In the figure above, an angle from each pair of vertical angles are adjacent angles and are supplementary (add to 180Â°). For example, in the figure above, 'Vertical' has come to mean 'upright', or the opposite of horizontal. But here, it has more to do with the word 'vertex'.