= 4 cm + 4 cm + 4 cm = 12 cm. A square and an equilateral triangle are both examples of regular polygons. Another method for finding the perimeter of a regular polygon is to multiply the number of sides by the length of one side. Let's revisit Examples 3 and 4 using this second method.
Cranial vault expansion is a surgery to correct and reduce the risk of future craniofacial deformities caused by a condition called pediatric craniostenosis. Pediatric craniosynstenosis is the name of a condition where pediatric sutures, which are bony plates in an infantâs head, fuse together too early.
1 The arches of groin vaults are round or pointed. 2  It is also known as a cross vault.Rib Vault 3. 3  A vault reinforced by masonry ribs is known as a rib vault. 4  When this type of vault has two masonry ribs dividing it into four sections, it is called a quadripartite rib vault.