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February 9th, 2019, 05:03 PM   #1
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Triangle question from a Math "Dummy"?

No math background... But need help.

What is the "?-ft." measurement?

Any questions?

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February 10th, 2019, 01:28 AM   #2
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The area of a triangle can be calculated as half its base multiplied by its height.

If the desired width is x feet, 43*21/2 = 43*8/2 + 21*x/2, so x = 43*13/21.
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February 10th, 2019, 05:05 AM   #3
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Gray-box?

‚ÄčI fear I may not be asking the right question.* Let me try to clarify... What are the dimensions of the "gray-box"?* Given is the 8-ft. side by ???*

Last edited by skipjack; February 10th, 2019 at 07:59 AM.
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February 10th, 2019, 06:57 AM   #4
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longer-side-of-"gray-box" = 43 - 344/21 = ~26.62 ft.

If you want to understand why, google "right triangles"
and "similar triangles".

If you have more questions, come back with a
labelled diagram so we can clearly refer to it...

Last edited by skipjack; February 10th, 2019 at 07:42 AM.
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February 10th, 2019, 07:51 AM   #5
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I happened to use the word "width" rather than "length", but the value 43*13/21 is correct. As a mixed fraction, it's 26 13/21.
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February 10th, 2019, 03:34 PM   #6
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26.62 ft.

26.62 ft. it is... Thanks!
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February 10th, 2019, 03:53 PM   #7
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That's 26 feet and 7.44 inches....

Are you a carpenter building something?
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February 10th, 2019, 04:03 PM   #8
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7.43
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February 10th, 2019, 04:31 PM   #9
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Reason...

Quote:
Originally Posted by Denis View Post
That's 26 feet and 7.44 inches....

Are you a carpenter building something?
Very close...

Attached: Inside the RED circle is a building/plot-plan. The arrow points to the "triangle" of land. I want to add an 8-ft. second-story deck, and needed to know how long I can build an 8-ft. deck.
Attached Images
File Type: jpg 400 PLOT1.jpg (20.9 KB, 5 views)
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February 10th, 2019, 04:32 PM   #10
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7.4285714285695
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