Answer:
4 yd
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= blh
840=(x*20*8)
840=(x*160)
840=(160x)
840=80x
x=10.5
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