Area of a triangle

Use "A" for "AREA" "B" for "BASE" and "H" for "HEIGHT"

The area of a triangle is the base times the height divided by 2.
Here are some bases (B) and heights (H):

Area of a triangle:

     B x H
A = ------   <-- Use this with whole numbers or decimals
       2
Examples:
Base = 8 ft Height = 4 ft
      8 x 4      32
 A = ------- =  ---- = 16 sq. ft. 
        2         2
Base = 8.5 ft Height = 4.5 ft

    8.5 x 4.5   38.25 
 A = ------- =  ---- = 19.125
        2         2    sq. ft.
Here's another formula that computes the same area: 

     1        
A = --- x  B  x  H   <== Use this with fractions and mixed numbers
     2
Fraction Examples:
Base = 3/5 in. Height = 1/4 in. 

     1     3     1      3
A = --- x --- x ---- = --- sq. in.
     2     5     4      40
Base = 2 in. Height = 3/4 in. 

     1     2     3     6     3
A = --- x --- x --- = --- = --- sq.  
     2     1     4     8     4  in.
Base = 1 1/2 cm. Height = 2 3/4 cm 

     1     3     11     33    2 1/16
A = --- x --- x ---- =  --- = sq. cm. 
     2     2      4     16
<=== convert mixed numbers to improper fractions first!
Decimal Examples:
Base = 9.5 feet Height = 12.1 feet 

A = .5 X 9.5 X 12.1

A = 57.48 sq. ft.
Base = 3.6 in. Height = 6.2 in. 

A = .5 X 3.6 X 6.2

A = 11.16 sq. in.