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gabbyalicorn
 one year ago
Figure DEFG is equivalent to a trapezoid with a semicircle removed from its upper base.
What is the area of figure DEFG?
gabbyalicorn
 one year ago
Figure DEFG is equivalent to a trapezoid with a semicircle removed from its upper base. What is the area of figure DEFG?

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gabbyalicorn
 one year ago
Best ResponseYou've already chosen the best response.0https://www.dropbox.com/s/8gu1yxvuppvea7n/Screenshot%2020150616%2023.44.12.png?dl=0

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.1first step: we have to compute the area of trapezoid, which is: \[Area = \frac{{\left( {B + b} \right) \times h}}{2} = \frac{{\left( {14 + 8} \right) \times 5}}{2} = ...c{m^2}\]

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.1second step: we have to compute the area of the half circle: \[area = \pi \times 4 \times 4 = ...c{m^2}\] please don't multiply by 3.14

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.1oops.. the area is: \[area = \frac{{\pi \times 4 \times 4}}{2} = ...c{m^2}\]

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.1now the requested area is the subtraction between those areas, namely: \[{\text{requested area}} = {\text{area of trapezoid  area of halfcircle}}\]

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.1hint: \[\begin{gathered} {\text{requested area}} = {\text{area of trapezoid  area of halfcircle = }} \hfill \\ {\text{ = }}55  8\pi = ... \hfill \\ \end{gathered} \]

gabbyalicorn
 one year ago
Best ResponseYou've already chosen the best response.0147.58 i think i didnt do it correctly

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.1no, you don't have to multiply by 3.14, the right option is B as you wrote before

gabbyalicorn
 one year ago
Best ResponseYou've already chosen the best response.0but then whhy did u put the pi ;;

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.1because the area of the half circle is: 8*pi

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.1thanks for your picture! It is a beautiful gift :)

gabbyalicorn
 one year ago
Best ResponseYou've already chosen the best response.0LOL. Well this time I didn't make it XDDDD but i'm glad you like it.

gabbyalicorn
 one year ago
Best ResponseYou've already chosen the best response.0Now i can sleep :) thank you Z_Z
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