B x H A =  <== Use this with whole numbers or decimals 2
1. Base = 8 ft. 8 x 4 32 Height = 4 ft. A =  =  = 16 2 2 sq. ft. 

2. Base = 8.5 ft. 8.5 x 4.5 38.25 Height = 4.5 ft. A =  =  = 19.125 2 2 sq. ft. 
1 A =  x B x H <== Use this with fractions 2 and mixed numbers
Fraction Examples:  

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

2. Base = 2 in. 1 2 3 6 3 Height = 3/4 in. A =  x  x  =  =  sq. 2 1 4 8 4 in.  
3. Base = 1 1/2 cm. 1 3 11 33 2 1/16 Height = 2 3/4 cm. A =  x  x  =  = sq. cm. 2 2 4 16 