Answer:
4 yd
Step-by-step explanation:
20 yd / 4yd is 5yd and 8yd / 4 yd is 2yd they both have the number for in common it is the greatest common factor so 4yd is the answer.
10.5
Volume of a triangular Prism= [tex]\frac{1}{2}[/tex]blh
840=[tex]\frac{1}{2}[/tex](x*20*8)
840=[tex]\frac{1}{2}[/tex](x*160)
840=[tex]\frac{1}{2}[/tex](160x)
840=80x
x=10.5
