Cubic Measure for Volume

000 cubic millimeters

(cu. mm.)

1000 cubic centimeters

=

(cu. cm. or c.c.)

1 cubic decimeter (cu. dm.)

1000 cubic decimeters = 1 cubic meter (cu. m.)

1 cubic meter = 1.308 cubic yards

C. A PROTRACTOR AND ITS USE

There are many kinds of protractors but the most satisfactory kind is a combined ruler and protractor. It should be made of celluloid because of its transparency. One edge of the ruler should be marked in English units and the other in metric units. One end should be marked in tenths of inches.

The Granville Combined Ruler and Protractor has one end marked in fiftieths of an inch and its width is exactly the square root of 2 inches.

Given any line AB. Select some point, C, in the line and place the center of the protractor at this point. Slide the protractor around until its 60° line exactly coincides with AB. Then draw a line along the edge CD. 4 BCD is a 60° angle.