The ruler shows inches in the customary system and centimeters in the metric system There are three major measurement systems used around the world. The most universally used system is the metric system. The metric system originated in France and is commonly referred to as theSIsystem, orSysteme...
It depends. There’s no perfect or right answer. Generally speaking, kids grow about 2 inches (6 centimeters) a year between age 3 and the time when they start puberty (when your body starts changing and becoming more grown up). [translate] ...