|
Rectangle |
1.
Figure the opening for the fireplace (length x width)
2.
Divide this number by 12 |
|
Circle |
Area = pi r2
Circumference = pi d
pi = 3.14
r = radius (half of diameter)
r2 = radius squared
d = diameter
Look at the charts below for round or ovalized liners. |
|
Oval |
1. Divide the shape into a rectangle and two half circles (1/2 circle on each end
of the rectangle)
2. Figure the area for the rectangle
3. Then figure the area for the circle
4. Add the two amounts together. This gives you the approximate area of the
oval
Look at the charts below for round or ovalized liners. |
|
Square |
Area = length (L) x width (W) |
|
Triangle |
Area = length (L) x width (W) x 1/2 |