HOW TO MEASURE LENGTH AND AREA 3 



EXERCISE 2 



HOW TO MEASURE LENGTH AND AREA 



Apparatus. Meter stick, table. 



a. Examine a meter stick. How many decimeters long is it? 

 How many centimeters? How many millimeters? How 

 many inches? 



b. With a ruler graduated in English units draw in your note- 

 book a horizontal line exactly 5 inches long. To make the 

 length accurate put the edge of the ruler against the paper, and 

 mark the ends of the line by means of a sharp-pointed pencil. 

 Now measure the line with the metric rule, and state its length 

 in centimeters and tenths of a centimeter. 



c. Measure, in centimeters, the dimensions of the top of your 

 laboratory table or of a kitchen table. Measure also the thick- 

 ness of the table top. Calculate how large a piece of oilcloth, 

 in square centimeters, you would need to cover the table top 

 and its edges, including the necessary slight lapping at each of 

 the four corners. From the table of equivalents given in the 

 appendix of the text calculate the number of square inches of 

 oilcloth needed. Change this area to square feet. To square 

 yards. Give all your work. 



d. Record your results thus : 



Length of table top, in cm. 

 Width of table top, in cm. 

 Thickness of table top, in cm. 

 Length of oilcloth needed. 

 Width of oilcloth needed. 

 Area of oilcloth, in sq. cm. 

 Area of oilcloth, in sq. in. 

 Area of oilcloth, in sq. ft. 

 Area of oilcloth, in sq. yds. 



