Need help with my geometry

[k0ua]

Great fun they were to use to. Interpolation used to be one of least enjoyable practices.

All thru high school, we all had a laminated sheet with log and sine, cosine, tangent tables on it that was provided by the US air force. They were very handy, I don't know what happened to mine, but of course we don't need them any more. I saw my first calculator after high school at the University Mo. at Rolla. It was made by Wang. It was the size of of small dormitory refrigerator and had about a dozen terminals around the room to do your calculations on. it had Nixie tubes (a type of high voltage gas discharge display tube) for a display. A year later I held a calculator in my hand. Technology really moved fast after LED's became available. LCD calculators came out a few years later. Soon they were blister packed at Wal Mart for a few bucks.

 

[westcliffe01]

I bought my Casio FX 850P when I started college in 1988

I still use it today. The add-on memory module no longer works, but other than that it still works as good as the day I bought it.... Back in the day there were 2 schools of people. Those who favoured the HP calculator with its perculiar syntax, and the others who liked the WYSIWYG method employed by the Japanese.

 

[ovrszd]

I don't need no stinking tables!! Don't need no fancy nancy calculator either!!!

I got you guys!!!!

 

[k0ua]

I still have and use my original TI-30 LED calculator. It is from 1976

 

[tallyho8]

I use my Casio 8R a few times a week and it still works perfect. I got it in the 70s.
I can see an LED readout much better than an LCD.

 

[2LaneCruzer]

I did all my calculations by hand. I still can't find my slide rule.

 

[ovrszd]

I did all my calculations by hand. I still can't find my slide rule.

How can a ruler with a sliding gauge be anything close to accurate????

 

[k0ua]

How can a ruler with a sliding gauge be anything close to accurate????

Supposed to be close to 3 digits behind the decimal. The last digit is pretty "iffy". We did pretty good with them "back in the day"

 

[ovrszd]

Supposed to be close to 3 digits behind the decimal. The last digit is pretty "iffy". We did pretty good with them "back in the day"

Wonder what percentage of High School students could use one??? HE**,,,, wonder what percentage of High School Teachers could use one????

 

[k0ua]

If you would like to learn more about slipsticks.:

Slide rule - Wikipedia, the free encyclopedia

 

[k0ua]

Wonder what percentage of High School students could use one??? HE**,,,, wonder what percentage of High School Teachers could use one????

Back in my day, anyone who took anything beyond general math or general science, (9th grade) would know how to use one. So roughly I would say 1/3 of the students. Today?. I would say zero percent. Most would not even know what it was.

 

[k0ua]

An awful lot of engineering and science was completed with the aid of a slide rule. It was apparently good enough. Oh, and they don't need batteries.

 

[tallyho8]

I asked my 20 year old nephew if he knew what a slide rule was. He almost instantly quoted me:

"The Slide Rule 7.08
THERE IS NO "MUST SLIDE" RULE!!!
Rule 7.08 - Any runner is out when -
(a) (3) the runner does not slide OR attempt to get around a fielder who HAS THE BALL and is waiting to make the tag.
The key phrases here are: "or attempt to get around" and "has the ball waiting to make the tag."
The runner may slide or attempt to get around the fielder. He does not have to slide. Plus, unless the fielder has the ball, the runner doesn't have to do either.
The purpose of the rule is to prohibit the runner from deliberately crashing into a defender who has the ball, for the sole purpose of knocking the ball loose, because the runner knows he is going to be out otherwise.
The fielder should not be in the base path without possession of the ball. If he is it is obstruction. Anytime a runner deliberately and maliciously crashes into a fielder he should be ejected for unsportsmanlike conduct. However, if a close play occurs and the runner does not slide and makes incidental contact with the defender before he has the ball, no call should be made. If the defender has the ball, the umpire should judge as to whether the runner made an attempt to get around the fielder. If he did, he should not be called out simply because he did not slide or made contact.
In attempting to get around a fielder who has the ball waiting to make the tag, the runner must not run more than 3 feet to either side of a line that goes between him and the base he is advancing to. If he does, he is out for violation of rule 7.08 (a) (1)

AAHHHH!!!!!
I wonder if he knows what carbon paper is?

 

[dickfoster]

I still have and use my original TI-30 LED calculator. It is from 1976

My first calculator I've had several versions of these.



I've still got a couple floating around somewhere. They don't need no stinkin batteries.

even this kind


I think they might even still make them but I still have mine.

When I was doing geodetic work we couldn't use any sort of slide rule because they weren't accurate enough so we had to haul these things around along with big books of trig functions etc.


I'd seen four function calculators in Japan but when these came out, I bought one and was in hog heaven.

It had scientific notation, reciprocal along with square and square root. I was in tall cotton for sure. SR was for Slide Rule. I could use it for some stuff but not the trig work.

Then HP came out with the HP65. I think it was the first user programmable and used magnetic strips to store your programs. I believe they hit on our outfit to give it a good workout before it was broadly introduced because we had to crank so many numbers. I could even do octal math on the thing. Truly a gift of the gods.

It even took the place of the big Wangs back at HQ and I think the computer section was even a little envious. I was in love because I didn't have to drag that boat anchor of a Monroe along with all those heavy books anymore. It saved me hours and hours plus I didn't have to crank the thing. I was branded and am still a fan and lifelong convert to RPN, it's the only way to fly.

 

[dickfoster]

Wonder what percentage of High School students could use one??? HE**,,,, wonder what percentage of High School Teachers could use one????

The question is would they even know what one was? :laughing:

 

[dickfoster]

An awful lot of engineering and science was completed with the aid of a slide rule. It was apparently good enough. Oh, and they don't need batteries.

They just about put man on the moon with them.

 

[k0ua]

Ah, yes RPN... (Reverse Polish Notation)...

 

[dieselcrawler]

Im sure my dad has, and can still proficiently use, a slide rule. As a kid (I was home schooled in the '80's and early 90's) dad made sure I knew what one was, showed me how to use it, which I've forgot since then. He always carried note cards in his shirt pocket, old computer punch cards... he found them great for making notes on...

 

[murphy1244]

Im sure my dad has, and can still proficiently use, a slide rule. As a kid (I was home schooled in the '80's and early 90's) dad made sure I knew what one was, showed me how to use it, which I've forgot since then. He always carried note cards in his shirt pocket, old computer punch cards... he found them great for making notes on...

We used to make Christmas wreaths out of them.

 

[dickfoster]

Im sure my dad has, and can still proficiently use, a slide rule. As a kid (I was home schooled in the '80's and early 90's) dad made sure I knew what one was, showed me how to use it, which I've forgot since then. He always carried note cards in his shirt pocket, old computer punch cards... he found them great for making notes on...

Then he might know what these are too.


I used to have to read five level tape but it was only good for base 8 or octal. Eventually got to where I could add and subtract but had to convert to do anything more with it. It was easy to get cross eyed and lose your place.



Things are much easier today.