= 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 entrance in the north facade of the barrel vault is over an open, hard paved, elliptical piazza.2  Externally, the barrel vault is covered in patinated zinc, emerging from the ground with a glazed facade to the south while, within, the precast vaulted roof is expressed. The entrance in the north facade of the barrel vault is over an open, hard paved, elliptical piazza.