Formula

Fahrenheit To Celsius
Celsius=(Fahrenheit-32.0)/1.8
C=(F-32)/1.8
(5/9)*(F-32)
Celsius To Fahrenheit
C*(9/5)+32
Area of Triangle= ½ lb => 0.5*l*b
Area of Circle = 3.14*r*r
Area of Rectangle = l*b
Area of Square = a*a
Circumference of rectangle = 2*(l*b)
Circumference of Circle = 2*3.14*r
Circumference of Triangle = l+b+sqrt(l*l+b*b)