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 January 24th, 2019, 12:33 PM #1 Newbie   Joined: May 2018 From: Idaho, USA Posts: 24 Thanks: 3 Need math advice Hello, So, I need a little advice on something. I am making a Math Valentine for a friend of mine for Valentine's Day. I want to make an equation that when it is done, it will say a Valentine message. I got this so far: Square root of -1 (s*2) + ((s/2)^2 * Pi) Unity symbol 4 Infinity symbol Let me explain so far. The square root of -1 is i. The equation I put in is if you have a diamond shape with two half circles on the top, forming a heart shape. I did an equation that found the area of a diamond, in this case all the angles are 90, then took the side length and divided it by two, to get the half circle radius, squared it, then multiplied it by Pi, to get the area of the two half circles. I then added them together to get the area of the heart shape. So the equation equals the area of a heart. Then, I put a U, which is the symbol for Unity in mathematics. and then put 4 and infinity after that. So, it would say "i (heart) u 4 infinity." What do you guys think? Anything I can do to make this Math Valentine better? I am open to any ideas. Jared Last edited by skipjack; January 24th, 2019 at 09:35 PM.
 January 24th, 2019, 01:00 PM #2 Senior Member     Joined: Sep 2015 From: USA Posts: 2,314 Thanks: 1230 you sure you want to do this?
January 24th, 2019, 01:30 PM   #3
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Math Focus: Wibbly wobbly timey-wimey stuff.
There's a typo in the function you gave... I graphed it and it's not a heart.

A quick and dirty heart has the formula $\displaystyle y = |x| \pm \sqrt{9 - x^2}$. (You need both the + and -.) There are better heart functions out there, but this one is the simplest I remember.

-Dan
Attached Images
 heart.jpg (15.0 KB, 1 views)

Last edited by skipjack; January 24th, 2019 at 09:27 PM.

 January 24th, 2019, 02:00 PM #4 Math Team   Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 13,978 Thanks: 994 tViAnLe
 January 24th, 2019, 02:49 PM #5 Senior Member   Joined: Dec 2015 From: iPhone Posts: 387 Thanks: 61 Why heart is a symbol of love , while it is just like the other parts of the body?
January 24th, 2019, 02:56 PM   #6
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Quote:
 Originally Posted by idontknow Why heart is a symbol of love , while it is just like the other parts of the body?
Why does a Valentine's heart not look like a real heart?

Probably because when you are in love your heart goes pitter patter. (For me and the nice women on the corner it's more like my is wallet going pitter patter.)

-Dan

January 24th, 2019, 03:09 PM   #7
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Quote:
 Originally Posted by idontknow Why heart is a symbol of love , while it is just like the other parts of the body?
https://en.m.wikipedia.org/wiki/Heart_(symbol)

This article postulates its earliest origins are actually from a plant with heart shaped leaves that was possibly used as a contraceptive.

 January 24th, 2019, 05:59 PM #8 Newbie   Joined: May 2018 From: Idaho, USA Posts: 24 Thanks: 3 @romsek, I do this every Valentine's day. She and I are good friends, and we text valentines to each other on Valentine's day. Most of the time, the valentines are jokes. This valentine I am planning is a joke valentine also. I don't plan to get serious any time soon. @topsquark, thanks for the tip. I don't see the typo, but I still appreciate the advice. I think I will use the equation you showed me. Thanks! I'm posting something else later on that you guys might find pretty cool. I found it out by myself. Jared Last edited by skipjack; January 24th, 2019 at 10:03 PM.
 January 24th, 2019, 10:07 PM #9 Global Moderator   Joined: Dec 2006 Posts: 20,298 Thanks: 1971 As your expression is for the heart's area, it doesn't convey its shape. Heart.jpg Thanks from topsquark
 January 25th, 2019, 07:56 AM #10 Newbie   Joined: May 2018 From: Idaho, USA Posts: 24 Thanks: 3 @skipjack, you have a point there. I did not think of that. I have some other ideas, this is just one. Another idea involves irrational numbers. Anyway, thanks guys for the help. I think this valentine will be too complicated for her to understand with some of the things you pointed out. Maybe I'll do this: "My love for you is like Pi. It goes on forever, but is irrational." Might be a nice joke. I have to say it's a joke, though. Jared

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