Length

Length is a fundamental concept in mathematics and is used to measure the size of an object in one dimension. It is typically measured in units such as meters, centimeters, feet, or inches. Understanding length is important in various mathematical and scientific contexts.

Units of Length

There are several units used to measure length, including:

• Meter (m)
• Centimeter (cm)
• Kilometer (km)
• Foot (ft)
• Inch (in)

Converting Units of Length

It is often necessary to convert between different units of length. To convert from larger units to smaller units, multiply by the appropriate conversion factor. To convert from smaller units to larger units, divide by the conversion factor.

Measuring Length

Length can be measured using various tools, including rulers, meter sticks, tape measures, and measuring tapes. It's important to understand how to read these instruments accurately to obtain precise measurements.

Perimeter

Perimeter is the total distance around the outside of a shape. When finding the perimeter of a shape, you add up all the sides. For example, the perimeter of a rectangle is found by adding the lengths of all four sides.

Practice Problems

1. Convert 3.5 meters to centimeters.
Answer: 3.5 meters = 350 centimeters

2. If a room is 12 feet long and 10 feet wide, what is the perimeter of the room?
Answer: Perimeter = 2(12 ft) + 2(10 ft) = 24 ft + 20 ft = 44 ft

3. A swimming pool is 25 meters long. How many centimeters is this?
Answer: 25 meters = 2500 centimeters

4. If a book is 9 inches tall and 6 inches wide, what is the perimeter of the book?
Answer: Perimeter = 2(9 in) + 2(6 in) = 18 in + 12 in = 30 in

5. Convert 4.2 kilometers to meters.
Answer: 4.2 kilometers = 4200 meters

6. A rope is 15 feet long. What is the length of the rope in yards?
Answer: 15 feet = 5 yards

[Length] Related Worksheets and Study Guides:

• Measuring LengthMathematics • Kindergarten