NEED SOME MATH HELP

[BLUEKNIGHT911]

I am trying to figure out what the angle is on my windshield......I put a carpenter square on the inside and used a magnetic level to get absolute vertical.....my numbers are : vertical 16 in., horizontal 15 1/2 inches, the third measurement on the face of the windshield is 22 inches....this is from the top of vertical the end of horizontal....if this makes sense....it's a triangle.....so any math major's out there want to help me I would appreciate it.. Mike...:thumbup::thumbup::thumbup::thumbup:

 

[rnet]

I am trying to figure out what the angle is on my windshield......I put a carpenter square on the inside and used a magnetic level to get absolute vertical.....my numbers are : vertical 16 in., horizontal 15 1/2 inches, the third measurement on the face of the windshield is 22 inches....this is from the top of vertical the end of horizontal....if this makes sense....it's a triangle.....so any math major's out there want to help me I would appreciate it.. Mike...:thumbup::thumbup::thumbup::thumbup:

mike if your horizontal measurement was 16, it would be a 45, so you are close, maybe 44

 

[BLUEKNIGHT911]

ANGLE ??

RON, Thanks this would be 44 degree's right....and that would be considered the "rake".???.....You saw it at Lake George , well I modified it a little by bringing the bottom edge forward 1 1/2 iches......It seems to be smoother now....Mike...:thumbup:

 

[Arr MiHardies]

Well, using trigonometry, I'd think it would be closer to 36 degrees.

Angle = atan( height / hypotenuse)
Angle = atan(16/22=.72...)
Angle = atan(.72...)=35.75

Though admittedly, my trigonometry is a bit rusty, but I'm pretty sure that sounds about right,

 

[Texmac1011]

was good with the +/- 45 degrees. Now, after reading Arr's info, my head hurts :shocked:

 

[rnet]

RON, Thanks this would be 44 degree's right....and that would be considered the "rake".???.....You saw it at Lake George , well I modified it a little by bringing the bottom edge forward 1 1/2 iches......It seems to be smoother now....Mike...:thumbup:

yes mike 44 degrees.

 

[arntufun]

If area = LxWxH then you must divide pie ( 3.14.33333) by the radius of the diameter and then you can subtract the miedian number.


If those numbers are correct, only then you can you say WTF am I talking about. :roflblack:

 

[MikeinGA]

Well, using trigonometry, I'd think it would be closer to 36 degrees.

Angle = atan( height / hypotenuse)
Angle = atan(16/22=.72...)
Angle = atan(.72...)=35.75

Though admittedly, my trigonometry is a bit rusty, but I'm pretty sure that sounds about right,

A+ for that answer. Good job.

Mike

 

[shelbydave]

This is the best I can do...:dontknow:

 

[rnet]

Ok Mike, I never took trig in school, but I did take geometry. I could not believe 1/2 " would change the angle 9 degrees so I got out the protractor and laid it out on a square and wala, 44 degrees. I really used an angle finder, just an elaborate protractor.

 

[arntufun]

Ok Mike, I never took trig in school, but I did take geometry. I could not believe 1/2 " would change the angle 9 degrees so I got out the protractor and laid it out on a square and wala, 44 degrees. I really used an angle finder, just an elaborate protractor.

Thats my boy !!!!!!!! :firstplace: NEVER MESS WITH NY !!!!!!!!!! :roflblack:

 

[dannymax]

Thats my boy !!!!!!!! :firstplace: NEVER MESS WITH NY !!!!!!!!!! :roflblack:

:agree::agree::agree: Yup!!

 

[BLUEKNIGHT911]

WINDSHIELD ANGLE

Thanks everybody, just eyeballing it I thought it was 44 5/32 but Ron I trust your Math before my eyeball......Thanks again....Mike..:shocked:

 

[Bob Denman]

:shocked: What the :cus: are we talking about, and who mentioned "pie"? I like pumpkin!

 

[dannymax]

:shocked: What the :cus: are we talking about, and who mentioned "pie"? I like pumpkin!

Yeah, exactly!! Besides Pi R 2 is wrong....pie are NOT square, pie are round
Cornbread R square!!

 

[murphybrown]

2+2=

Ahhh 3??? Math classes? I smooched the teachers or I'd still be in class!!:roflblack::roflblack:

 

[Bob Denman]

Yeah, exactly!! Besides Pi R 2 is wrong....pie are NOT square, pie are round
Cornbread R square!!

Cornbread...
Love it with appropriately hot chili!
Cayenne and Habaneros! The "Flamethrower Special" :thumbup:

 

[Doodah]

Well, using trigonometry, I'd think it would be closer to 36 degrees.

Angle = atan( height / hypotenuse)
Angle = atan(16/22=.72...)
Angle = atan(.72...)=35.75

Though admittedly, my trigonometry is a bit rusty, but I'm pretty sure that sounds about right,

I think there are two problems here. First, at least one of the OP's measurements was inaccurate. If the height was 16 and the width was 15.5, the hypotenuse would be approx 22.27. Second, you really wanted to take the acos, not atan. Cosine is the ratio of the side adjacent to an acute angle (in a right-angled triangle) to the hypotenuse.

angle = acos(16/22.27) = 44.1 degrees

 

[Bob Denman]

:shocked::hun: I've been out of school too long!

 

[Arr MiHardies]

I think there are two problems here. First, at least one of the OP's measurements was inaccurate. If the height was 16 and the width was 15.5, the hypotenuse would be approx 22.27. Second, you really wanted to take the acos, not atan. Cosine is the ratio of the side adjacent to an acute angle (in a right-angled triangle) to the hypotenuse.

angle = acos(16/22.27) = 44.1 degrees

Huh. I referenced a website to refresh my memory on cos, sin, and tan. But I must have misunderstood, or the website was incorrect.
Either way, I said I may have been wrong.

Well... My math was correct, just applied incorrectly.