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A parallelogram ABCD has perimeter equal to  124 . Let E be the foot of the perpendicular from A to BC, and let F be the foot of the perpendicular from A to CD. If AE= 7 and AF=20, what is the area of the parallelogram?

 
 Jun 6, 2021
 #1
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area=base*height

24*AB=7*BC

24(62-BC)=7*BC

BC=48

AB=14

Area=24*14=336

 

 

 

 

 

 

 

JP

 
 Jun 6, 2021
 #8
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A parallelogram ABCD has a perimeter equal to 124. Let E be the foot of the perpendicular from A to BC, and let F be the foot of the perpendicular from A to CD. If AE= 7 and AF=20, what is the area of the parallelogram?

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

AB = x         AD = 62 - x          AE = 7          AF = 20

 

Triangles ABE and ADF are similar.

 

x / 7 = (62 - x) / 20

 

[ABCD] = AE * AD

 
jugoslav  Jun 7, 2021
edited by jugoslav  Jun 7, 2021
 #2
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Your EXCESS white space is an irritating distraction at best, and a time-wasting nuisance at worst. If

 

 

 

everyone did that, it would take a bloody hour to scroll through the answers on the main answer page. 

 

 

 

Your posts are not sacred scripture.

 

 

 

Your math solutions are average fare.

 

 

 

And even if you solutions are wonders to behold,

 

 

 

Let the math speak for itself.

 

 

There is no need for the arrogant,

 

 

supercilious,

 

 

 

self-aggrandizing

 

 

Whiteness of Being  

 

 

 

As you might see, it’s quite irritating.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

.

 
 Jun 6, 2021
edited by Guest  Jun 6, 2021
 #3
avatar+174 
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I mean, if you don't like it, that's completely fine, just tell me. There's no need to be rude. Just saying. Also, look at your problem. Do you realize that you have white space too?

 
JKP1234567890  Jun 6, 2021
 #4
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I don't know, but if I'm helping a person answer the problem, shouldn't you be grateful? If there's literally four lines of white space, is it really that big of a deal?

 
JKP1234567890  Jun 6, 2021
 #5
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Do you realize that you have white space too?

 

Really? I’m so surprised you noticed.  I was using the Whiteness of Being communication protocol. It seemed appropriate, here....

----------

If there's literally four lines of white space, is it really that big of a deal?

 

For a mathematician, you do not count very well.  There are seven (7) lines of white space here. One of your other posts has one line of text with nine (9) white space lines. Some have none – such as on your more complex solutions. 

 

I don't know, but if I'm helping a person answer the problem, shouldn't you be grateful?

 

Perhaps I would be if I needed an answer or solution to the problem, but, in any case, I would be more grateful if I were not blinded by excess white space.

Three or four lines should be enough.  This electronic forum is not a sacred scroll nor is it a roll of toilet paper. There is no need to treat it as such. 

 

 

.

 
 Jun 6, 2021
 #6
avatar+174 
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What I meant, for the first question, was that many other people have white space as well.

For the second question, even if there are seven lines, again, is it that big of a deal? 

For the third question, if you don't want to know the answer, why even look at the question then? As long as I have helped someone, and my answer is correct, I think that's good. If you simply ask nicely, and say "I think that too much white space isn't good" or something like that, that's fine. You can see that for some of my solutions (after you said that nobody likes too much white space), I completely understand. 

Also, I didn't mean to sound arrogant, supercilious, and self-aggrandizing. If I sounded that way (simply because I added seven white spaces, I'm sorry. Like I mentioned before, I don't use much white space (one line at most) anymore). 

 
JKP1234567890  Jun 6, 2021
 #7
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What I meant, for the first question, was that many other people have white space as well.

 

Question posts are formatted by the operating system differently than answer posts.

 

On the thread, question posts are formatted to have a minimum of eleven (11) lines with specific margins.  There is one white line above the first text line and one each above and below the timestamp. If a poster only posts one line the there will be six (6) lines of whitespace before the time stamp. Two lines of text will result in five (5) lines of whitespace. Etc. There will always be at least one line of whitespace before and after the timestamp.

 

Answer posts are formatted to have a minimum of 5 lines, with the same margins as the question post.  So, there can be up to four (4) lines of whitespace in the text zone without the post intentionally adding more. Again, there will always be at least one line of whitespace before and after the timestamp.

 

These margins and specifications approximate optimum readability aesthetics.   For both Question and answer posts, excess carriage returns (CR) are truncated unless they are appended by one or more characters.

 

On the questions index page, question posts are truncated with a “read more” followed by one, two or three lines of whitespace, deepening on how many lines of text are in the post. Here, the allocated space is uniform and fixed for each question post.

 

On the answers index page, the answer is presented in its entirety. The allocated space is dynamic for each answer post, with a minimum fixed size for short posts. This variability is part of the nature of the answer index and isn’t distracting unless a post has irregular formatting or excess white space.  The posts become very distracting when there are more than four (4) sequential lines of whitespace — This is especially distracting on the answer’s index page.

 

...this answers your second question: For the second question, even if there are seven lines, again, is it that big of a deal? 

 

For the third question, if you don't want to know the answer, why even look at the question then?

 

In this case I didn’t look at the question, only the answer.  I posted here because this was your most recent example of excess whitespace. It’s as simple as that. 

 

Also, I didn't mean to sound arrogant, supercilious, and self-aggrandizing. If I sounded that way (simply because I added seven white spaces, I'm sorry. Like I mentioned before, I don't use much white space (one line at most) anymore).

 

That’s wonderful, JP; I’ll stop trolling you about it.  Until next time...

 
Guest Jun 6, 2021
edited by Guest  Jun 7, 2021

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