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In the figure, AD || BC. What is the perimeter of quadrilat

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In the figure, AD || BC. What is the perimeter of quadrilat [#permalink] New post 09 Jun 2018, 08:27
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Question Stats:

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Attachment:
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In the figure, AD || BC. What is the perimeter of quadrilateral ABCD?



A. 590

B. 600

C. 620

D. 640

E. 680
[Reveal] Spoiler: OA

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Re: In the figure, AD || BC. What is the perimeter of quadrilat [#permalink] New post 09 Jun 2018, 11:23
Carcass wrote:
Attachment:
rectangular.jpg


In the figure, AD || BC. What is the perimeter of quadrilateral ABCD?



A. 590

B. 600

C. 620

D. 640

E. 680


Draw a perpendicular line from C to other side, keep it point E.

We have a right triangle with 40^2 + x^2 = 2500 => x = 30.

total perimeter is 280 + 40 + 50 + 250 = 620. ( note 280 = 250 + 30)

Option C.
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Re: In the figure, AD || BC. What is the perimeter of quadrilat [#permalink] New post 09 Jun 2018, 11:25
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I have finished the kudos for you today and your correct answers :)

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Re: In the figure, AD || BC. What is the perimeter of quadrilat   [#permalink] 09 Jun 2018, 11:25
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In the figure, AD || BC. What is the perimeter of quadrilat

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