Length is a measurement of how long an object is from one end to the other. It can be measured in various units, such as meters, centimeters, inches, or feet. Length is an important concept in many fields, including science, engineering, and everyday life, as it helps us understand the size and scale of objects. In geometry, length is often used to describe the dimensions of shapes, such as the sides of a rectangle or the radius of a circle. Tools like rulers and measuring tapes are commonly used to determine length accurately. Understanding length is essential for tasks like construction, sewing, and crafting.