Noel correctly adds the length of three sides of a rectangle and gets 88 cm her brother Ryan correctly adds the lengths of three sides of the same rectangle and gets 80cm. What is the number of cm in the perimeter of the rectangle. I was having this discussion with another teacher and we need a third opinion.
Tooth crowns. A tooth crown or dental crown is a tooth-shaped sleeve made of porcelain or metal or a combination of both that is placed over a tooth. The dentist will match it up to the shape and colour of your other teeth.
The top part of the tooth is the crown. This is the part that is visible in your mouth. The bottom part of the tooth is the root. A tooth is composed of the outer layer of the crown called enamel, the middle layer called dentin, and the inside layer called the pulp. The pulp contains the nerves and blood vessels for the tooth. The outer layer of the root is the called the cementum.