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Mathematics 19 Online
OpenStudy (anonymous):

HELP NEEDED ASAP

OpenStudy (lgbasallote):

HELP GIVEN ASAP

OpenStudy (anonymous):

The figure below shows AB = 5 units and BD = 7 units. If the area of triangle ADE is 40 square units, what is the area of the trapezoid BCED? 33.06 square units 38 square units 35 square units 36.18 square units

OpenStudy (anonymous):

OpenStudy (anonymous):

im so stuck on this one -___-

OpenStudy (saifoo.khan):

There's a formula: \[\frac{A^2}{a^2} = \frac{L^2}{l^2}\]

OpenStudy (anonymous):

how do i find the A and the a ?

OpenStudy (saifoo.khan):

\[\frac{40} {a}= \frac{12^2}{5^2}\]

OpenStudy (anonymous):

40a and 5.76?

OpenStudy (anonymous):

i know i did that wrong lol

OpenStudy (saifoo.khan):

Lol. Just a sec. I think i did a mistake too. -_-

OpenStudy (anonymous):

ah okayy

OpenStudy (saifoo.khan):

Do you have the correct answer by any chance?

OpenStudy (saifoo.khan):

I'm getting 13.6 :S

OpenStudy (saifoo.khan):

\[\frac{40}{a} = \frac{12^2}{7^2}\]

OpenStudy (anonymous):

33.06 square units 38 square units 35 square units 36.18 square units

OpenStudy (anonymous):

those are my choices

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