a circle with a point at the top
A cone
It will be the same angle subtended by its circumference.
It depends if the polygon is convex or concave but if it is a regular polygon it would have 560
as special case means how many sides or vetex is on a rectangle as a parallelogram it's a closed figure I hope that will help
Mild prominence of the sulcal markings at the vertex refers to slight elevations or indentations in the brain's surface grooves (sulci) in the region of the vertex, which is the top part of the skull. This finding can be a normal anatomical variation and may not indicate any pathology. However, it can also be associated with age-related changes or other neurological conditions, so context from imaging studies and clinical evaluation is important for interpretation.
Depending upon the age of the system, there are PCI graphics cards available that would give you 256MB of RAM. An example would be NVidia's 5200 or 5500 series. I have seen these cards available at Wal-Mart and Best Buy. ATI also makes PCI cards. Your Price Range is going to vary between $49 - $80. For AGP or PCI-X cards, you will need a newer motherboard. It is likely you will need a newer processor to move to PCI-X as many of the boards that support PCI-X require a different processor than those commonly found on HP Desktops made in the last 5 years. You cannot really get around this, if you want better performance, you will have to upgrade. Even upgrading has its hardware limitation.