### Circumference

*d*the diameter.

### Area

*a*is the base and

*b*the height.

^{2}, in which

*a*is one of the sides.

*a*is the base and

*b*the height.

*h*is the height,

*a*the longer parallel side, and

*b*the shorter.

^{2}, in which

*a*is one of the sides.

^{2}, in which

*a*is one of the sides.

^{2}, in which

*a*is one of the sides.

^{2}, in which

*r*the radius.

### Volume

^{3}, in which a is one of the edges.

*a*is the length,

*b*is the width, and

*c*the depth.

*A*is the area of the base and

*h*the height.

^{2}h, in which

*r*the radius of the base, and

*h*the height.

^{2}h)/3, in which

*r*theradius of the base, and

*h*the height.

^{3})/3, in which

*r*the radius.

### Temperature Scales

_{C}=

^{5}/9 (T

_{F} 32)

_{F}=

^{9}/5 T

_{C}+ 32

_{K}= T

_{C}+ 273.15

### Miscellaneous

^{2}, in which

*t*is the time in seconds.

*t*is the temperature Centigrade, multiply it by 1087, and divide the result by 16.52.

*W*is the number of watts,

*t*the time in hours, and

*c*the cost in cents per kilowatt-hour.

^{2}, in which

*E*is the energy in ergs,

*m*the mass of the matter in grams, and

*c*the speed of light in centimeters per second: (c

^{2}= 9 × 10

^{20})