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.
How a crown is done. 1  Your dentist gives you a local anesthetic. 2  To make room for the crown, your dentist files down the tooth that needs to be restored. 3  An impression of the filed-down tooth and nearby teeth is taken. This impression is used to custom make your final crown. The crown is built using restorative material (material used for fillings) based on the impression. The final crown will be the right shape for your mouth.