Find the volume of the prism [8 x 2 x 5 ]

Mathematics

2 answers:

ycow [4]4 years ago

7 0

Answer:

Step-by-step explanation:first you multiply from left to right and then you will get you answer

Novosadov [1.4K]4 years ago

4 0

Answer:80

Step-by-step explanation:

Volume of a prism= Base × height

Base area= length×width (for a rectangle base prism)

Base=5×2=10cm2

Volume=Base×height

V=10×8=80cm3

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Given the diagram below with line DE║ line AC. Find BC.

Karolina [17]

Answer:

13.5

Step-by-step explanation:

In triangle ABC, DE || AC

Therefore by basic proportionality theorem:

$\frac{BD}{DA} = \frac {BE}{EC} \\\\\therefore \frac{4}{8} = \frac {BE}{9} \\\\\therefore \frac{1}{2} = \frac {BE}{9} \\\\\therefore BE = \frac{9}{2} \\\\\therefore BE = 4.5\\\because BC = BE + EC \\\therefore BC = 4.5 + 9\\\huge \red {\boxed {\therefore BC = 13.5}} \\$