How would I find the volume of this figure? http://i.imgur.com/3yHcbib.jpg

Question

anonymous · Answer

get the area(by dividing the shape to pentagon and triangle) times height (area is constant along the height)
i can't understand the dotted line

sepeario · Answer

Yeah neither can I @Catch.me but thanks anyway

aum · Answer

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aum · Answer

Area of pentagon = area of ( ADE + ABD + BCD) = 2 * ADE + ABD

Area of ADE = 1/2 * base * height = 1/2 * 8 * 6.8
Area of ABD = 1/2 * 8 * 13

Volume = Area pf pentagon * 6

sepeario · Answer

What happens to the dotted line? @aum

aum · Answer

The dotted line on the left is just a perpendicular line from D to the side AE and that gives the height of the triangle ADE (= 6.8 cm).

sepeario · Answer

Ok, thanks very much @aum

aum · Answer

You are welcome.