400
Solve to see if Mary's answer is correct :
The triangular prism has the height of 6 inches , the base is 5 inches and the width is 9 inches. She solved this problem and got the answer 80 inches cubed , is her answer correct ? Explain.
The answer is 90.
V = 1/3 6 x 9 x 5
V = 1/3 270
V =90 inches cubed