The Vette Barn

The Vette Barn (https://www.thevettebarn.com/forums/index.php)
-   Off Topic (https://www.thevettebarn.com/forums/forumdisplay.php?f=38)
-   -   Geometry help. (https://www.thevettebarn.com/forums/showthread.php?t=118891)

Defib1961 03-12-2019 2:41pm

Geometry help.
 
1 Attachment(s)
I never was good at geometry. Someone would ask me to find an angle, all I could do was point at a crooked line and say, "There it is."

So here is the question: Side "A" is 6 inches long, Hypotnuese is 29.5 inches long, Side B is 29 inches long. What the hell is my angle?

Attachment 23958

TIA!

MrPeabody 03-12-2019 2:47pm

I was very good at geometry. But that was 50 years ago.:leaving:

99 pewtercoupe 03-12-2019 2:54pm

https://www.mathsisfun.com/algebra/t...-triangle.html

DAB 03-12-2019 3:14pm

Quote:

Originally Posted by Defib1961 (Post 1661581)
I never was good at geometry. Someone would ask me to find an angle, all I could do was point at a crooked line and say, "There it is."

So here is the question: Side "A" is 6 inches long, Hypotnuese is 29.5 inches long, Side B is 29 inches long. What the hell is my angle?

Attachment 23958

TIA!

sine = opposite/hypotenuese

sine of small angle = 6/29.5 = 0.23389

so angle = 11.74 degrees.

Cybercowboy 03-12-2019 3:18pm

sin(a) = 6/29.5

a = 11.73 degrees

The other angle is 90-11.73 = 78.27 degrees

Cybercowboy 03-12-2019 3:24pm

To work it out just using the two sides (not the hypotenuse) then it would be:

tan(a) = y/x = 6/29

a = arctan(6/29) = 11.69 degrees

I'm thinking this is really your angle since there's no way your hypotenuse is 29.5 with the other two sides being 29 and 6 respectively. There's a measurement error there. I mean, it's probably very close to 29.5, but if the other two sides are precisely 29 and 6 respectively, the hypotenuse is actually:

sqrt(6^2 + 29^2) = 29.61 inches.

DAB 03-12-2019 3:27pm

if you don't have a calculator handy, you can also solve this on the slide rule, using the C and D scales to find 6/29.5 = 0.203, and then flipping it over to read the angle off the S scale = 11.74 degrees.

:dance:

Cybercowboy 03-12-2019 3:32pm

And children, always remember, all you need to totally know everything about a right triangle is, other than it's a right triangle, is two more pieces of information. The length of any two sides, or a side length and an angle. That's it!

69camfrk 03-12-2019 4:32pm

1 Attachment(s)
Hope this helps...:D

Attachment 23959

StaticCling 03-12-2019 6:35pm

Quote:

Originally Posted by Defib1961 (Post 1661581)
Hypotnuese

That's racist!

JRD77VET 03-12-2019 7:22pm

1 Attachment(s)
Quote:

Originally Posted by Defib1961 (Post 1661581)
I never was good at geometry. Someone would ask me to find an angle, all I could do was point at a crooked line and say, "There it is."

So here is the question: Side "A" is 6 inches long, Hypotnuese is 29.5 inches long, Side B is 29 inches long. What the hell is my angle?

Attachment 23958

TIA!

With side "a" at 6" long and the hypotenuse at 29.5 inches long, angle "A" is 11.735°

Right Scalene Triangle
Side a = 6
Side b = 28.88339
Side c = 29.5

Angle ∠A = 11.735° = 11°44'7" = 0.20482 rad
Angle ∠B = 78.265° = 78°15'53" = 1.36598 rad
Angle ∠C = 90° = 1.5708 rad = π/2


With side "a" at 6" long and side "b" at 29" long, angle "A" is 11.689°

Right Scalene Triangle
Side a = 6
Side b = 29
Side c = 29.61419

Angle ∠A = 11.689° = 11°41'22" = 0.20402 rad
Angle ∠B = 78.311° = 78°18'38" = 1.36678 rad
Angle ∠C = 90° = 1.5708 rad = π/2


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

I used this on line calculator to copy the info for pasting
https://www.calculator.net/triangle-calculator.html

I also used my machinist calculator and came up with the same values.
https://www.ebay.com/itm/Calculated-...frcectupt=true

Now if I was making this part for you, you would have gotten a phone call or an email asking which values to use. :toetap:

snide 03-12-2019 7:43pm

42. :leaving:

DAB 03-12-2019 8:31pm

Quote:

Originally Posted by JRD77VET (Post 1661607)
With side "a" at 6" long and the hypotenuse at 29.5 inches long, angle "A" is 11.735°

Right Scalene Triangle
Side a = 6
Side b = 28.88339
Side c = 29.5

Angle ∠A = 11.735° = 11°44'7" = 0.20482 rad
Angle ∠B = 78.265° = 78°15'53" = 1.36598 rad
Angle ∠C = 90° = 1.5708 rad = π/2


With side "a" at 6" long and side "b" at 29" long, angle "A" is 11.689°

Right Scalene Triangle
Side a = 6
Side b = 29
Side c = 29.61419

Angle ∠A = 11.689° = 11°41'22" = 0.20402 rad
Angle ∠B = 78.311° = 78°18'38" = 1.36678 rad
Angle ∠C = 90° = 1.5708 rad = π/2


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

I used this on line calculator to copy the info for pasting
https://www.calculator.net/triangle-calculator.html

I also used my machinist calculator and came up with the same values.
https://www.ebay.com/itm/Calculated-...frcectupt=true

Now if I was making this part for you, you would have gotten a phone call or an email asking which values to use. :toetap:

Slide rule! :dance:

JRD77VET 03-12-2019 8:35pm

Quote:

Originally Posted by DAB (Post 1661612)
Slide rule! :dance:

I haven't handled a slide rule since junior high school.
:leaving:

DAB 03-12-2019 8:45pm

Quote:

Originally Posted by JRD77VET (Post 1661614)
I haven't handled a slide rule since junior high school.
:leaving:

Have one on my desk. Been learning how to use it lately.

StaticCling 03-12-2019 8:57pm

Quote:

Originally Posted by JRD77VET (Post 1661614)
I haven't handled a slide rule since junior high school.
:leaving:

I've got a friend that was on a slide rule kick a few years ago. Buying them at flea markets and antique stores. He was hell bent on ignoring modern technology.

When he finally got a smart phone, he downloaded a rotary dial app for it. :funnier:

MikeB 03-12-2019 9:01pm

Quote:

Originally Posted by chinaski (Post 1661602)
That's racist!

This is what I imagine........




https://www.nueskes.com/assets/1/20/...er_900x900.jpg

JRD77VET 03-12-2019 9:01pm

Quote:

Originally Posted by chinaski (Post 1661616)
I've got a friend that was on a slide rule kick a few years ago. Buying them at flea markets and antique stores. He was hell bent on ignoring modern technology.

When he finally got a smart phone, he downloaded a rotary dial app for it. :funnier:

Tell him if he had a real rotary phone, he could dial just by clicking the button on the cradle that hangs it up :yesnod:

mrvette 03-13-2019 1:35am

I have an old ATT stepper relay laying around here...that means I am without question the most biggest nerd here in this group.....

Hell, I even have a Klystron Oscillator tube on the window sill.....

Olustee bus 03-13-2019 5:17am

I often make use of hypotenuse while squaring construction. I don't know what the hell it is but I use it somehow.


All times are GMT -5. The time now is 5:27am.

Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
User Alert System provided by Advanced User Tagging (Pro) - vBulletin Mods & Addons Copyright © 2024 DragonByte Technologies Ltd.
Copyright © 2009 - 2024 The Vette Barn