Triangle Calculations

 
Height
(cm)
Width
(cm)
Space for Calculation
My answer
(cm2)
Computer's
Answer
Triangle 1:
          
Triangle 2:
          
Triangle 3:
          
Triangle 4:
          
Triangle 5:
          
Triangle 6:
          
Triangle 7:
          
Triangle 8:
          
Triangle 9:
          
Triangle 10: