1. ## Angle chaser

Triangle ABC is Isosceles

The vertex angle BAC is 20 degrees

Initially 3 lines have been drawn BD, CE and DE.

DBC= 60 degrees

BCE = 50 degrees

You must find the angle ? placed at BDE

<span style="background-color: #FFFF00; color: #FFFF00; font-weight: bold">To assist your angle chase I have provided you with a clue which you may need to finish the problem</span hide>

2. ## Re: Angle chaser

<span style="background-color: #FFFF00; color: #FFFF00; font-weight: bold">30

3. ## Re: Angle chaser

<span style="background-color: #FFFF00; color: #FFFF00; font-weight: bold">402854</span hide> <img src=/S/grin.gif border=0 alt=grin width=15 height=15>

4. ## Re: Angle chaser

Woooowah

That passed me by. I thought I was going mad when I realised I was on holiday during those two weeks of August.

OK, Steve as a supplementary. What was the name of the person who first proposed this triangle?

5. ## Re: Angle chaser

<span style="background-color: #FFFF00; color: #FFFF00; font-weight: bold">John Conway</span hide>?

6. ## Re: Angle chaser

<span style="background-color: #FFFF00; color: #FFFF00; font-weight: bold"> No he was more famous for the Game of Life

By the way I have created a very simple Excel version of the game that a colleague and I did if you want to have a look

</span hide>

7. ## Re: Angle chaser

Thanks, I already have a version of Life in a spreadsheet, I don't know any more where I got it from.

8. ## Re: Angle chaser

I don't know who created it.

I would be interested in a game of Life simulation.

Steve

9. ## Re: Angle chaser

Conway's Game of Life freeware for Windows9x/NT/2000/XP
Many other hits on Google under: freeware "game of life"

Alan

10. ## Re: Angle chaser

Thanks, but I was more interested in the excel version, so I could "browse the programming" to see the logic that was used...

Steve

11. ## Re: Angle chaser

Perhaps Jezza will post his version. A Google search will turn up several implementations of Life in a spreadsheet, e.g. Math on Spreadsheets

12. ## Re: Angle chaser

Thanks. I always like to look at new techniques to do things. It gives me ideas...

Steve

13. ## Re: Angle chaser

Steve

I looked at my Game of Life last night and realised it is quite a massive workbook and even when zipped it is a 700Kb. If you like I could precis it in a word doc and send to you, the logic use Conways rules of life and death using a long nested,nested If statement and a routine to cut and paste using VBA. It whizzes through, my other version which was partly a hack of the code from the previous links is exceptionally slow compared to my version. Problem is large file size gives good speed but low file size gives slow game.

Oh and by the way it was E.M. Langley who first proposed the isosceles triangle puzzle

14. ## Re: Angle chaser

I'd definitely go for "slow enough to follow the detail" over "fast enough to run thousands of generations in the blink of an eye".

StuartR

15. ## Re: Angle chaser

Alan

Yes, I remember reading Martin Gardner's columns about interesting Life patterns in Scientific American probably 20-40 years ago... (memory failure...!)

John

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