...expresses the ratio of two magnitudes. When it is said that the angle = arc , it is only meant that, is equal to the radius, the number of these units...the radius being r, one half of the circumference is rx 3. 141 59266; and one-fourth of the circumference, or the arc of a right angle, is rx 1.57079633....

...meant that, on one particular supradius position, (namely, that the angle 1 is that angle whose arc is equal to the radius,) the number of these units...for our purpose, it follows that the radius being r, one-half of the circumference is r X 3.14159266 ; and one-fourth of the circumference, or the arc of...

...table: 5. Find the ratio of the circumferences to the diameters of the coins of problem 27, p. 90. 6. It is proved in Geometry that the ratio of the circumference of any circle to its diameter is about 3|, or more accurately 3.1416. If then, the diameter of a circle...

...table : 5. Find the ratio of the circumferences to the diameters of the coins of problem 27, p. 90. 6. It is proved in Geometry that the ratio of the circumference of any circle to its diameter is about 3|, or more accurately 3. 1416. If then, the diameter of a circle...

...their circumferences to their diameters. If no circles are at hand use the measures of the table. 4. It is proved in Geometry that the ratio of the circumference of any circle to its diameter is about 3y, or more accurately 3.1416. If, then, the diameter of a circle...

...CH= 3 ch., and EL = 3 ch. The Circle (For definition of terms and important facts see page 229.) 460. It is proved in geometry that the ratio of the circumference of a circle to the diameter is 3.1416, nearly. The Greek letter IT (pi) stands for this ratio ; then, if...