Measuring Length Using Centimeters

Measuring Length Using Centimeters

The line is 4.2 cm. Start the ruler at zero. The tiny spaces between the larger numbered lines are millimeters. They are one tenth of a centimeter. Notice the line is 4 whole centimeters and two tenths of centimeter.

Each centimeter has 10 smaller divisions. These are millimeters. 3.4 centimeters or 3.4 cm is the same as 3 centimeters and 4 millimeters.

Practice: Measure the following lines and items in centimeters.

a)
b)

Measure each side of the following shapes. Add the lengths of the sides. The PERIMETER is the total length around a flat shape.

a) / Rectangle / Parallelogram / Right triangle
b) / Pentagon / Isosceles Triangle / Regular hexagon
c) / Trapezoid / Acute Triangle / Obtuse Triangle