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Posted: 2/7/2006 5:33:32 PM EDT
[Last Edit: 2/7/2006 5:56:46 PM EDT by 1GUNRUNNER]
Link Posted: 2/7/2006 5:35:19 PM EDT
is a trapezoid a four sided figure?

if so, I don't understand how only one end could be angled.

Link Posted: 2/7/2006 5:37:34 PM EDT
What are you talking about
Link Posted: 2/7/2006 5:40:12 PM EDT
Link Posted: 2/7/2006 5:42:20 PM EDT
A parallelogram.
Link Posted: 2/7/2006 5:42:34 PM EDT
a trapezoid is defined as :

A quadrilateral with exactly one pair of parallel sides, called bases. The other sides are legs.

so your question doesn't make sense.

Link Posted: 2/7/2006 5:44:00 PM EDT
[Last Edit: 2/7/2006 5:45:41 PM EDT by 1GUNRUNNER]
Link Posted: 2/7/2006 5:44:11 PM EDT

Originally Posted By SWS:
A parallelogram.



a parallelogram has a point on the opposite corner from the other "pointy" corner

Link Posted: 2/7/2006 5:45:01 PM EDT
I'll guess:

a "right" trapezoid considering the angle between the base and one "leg" is 90 degrees
Link Posted: 2/7/2006 5:45:12 PM EDT
[Last Edit: 2/7/2006 5:45:40 PM EDT by danonly]

Originally Posted By 1GUNRUNNER:

Originally Posted By twl:
rhombus



Nope.

Imagine a trapezoid with 90 degree corners only one end is angled.



if a trapezoid has 90 degree corners it would be a square.
or rectangle
Link Posted: 2/7/2006 5:45:40 PM EDT

Originally Posted By 1GUNRUNNER:

Originally Posted By twl:
rhombus



Nope.

Imagine a trapezoid with 90 degree corners only one end is angled.




WTF

all of the corners are angled
Link Posted: 2/7/2006 5:46:49 PM EDT
Link Posted: 2/7/2006 5:50:11 PM EDT
Link Posted: 2/7/2006 5:50:35 PM EDT
It can be approximated by a combination rectangle and right triangle, and the area found from there, and that's all you need to know.
Link Posted: 2/7/2006 5:51:15 PM EDT
The correct answer is a duck.
Link Posted: 2/7/2006 5:51:38 PM EDT
[Last Edit: 2/7/2006 5:53:55 PM EDT by danonly]

Originally Posted By 1GUNRUNNER:
If you guys don't stop this I am gonna start over with a new thread!



n/m

Link Posted: 2/7/2006 5:53:07 PM EDT
Here is a VERY BAD graphic representation of that he is talking about using only the keyboard

_____
|_____\

Fill in the gaps and you have what he is discribing
Link Posted: 2/7/2006 5:53:12 PM EDT
[Last Edit: 2/7/2006 5:54:57 PM EDT by Arkansas_Rocketman]
Quadrilateral?
Link Posted: 2/7/2006 5:54:06 PM EDT
Link Posted: 2/7/2006 5:54:15 PM EDT
Link Posted: 2/7/2006 5:57:15 PM EDT

Originally Posted By danonly:

Originally Posted By 1GUNRUNNER:
If you guys don't stop this I am gonna start over with a new thread!



I don't get it- a trapezoid is defined as a quadrilateral having only two sides (opposite, of course) parallel. If one of the corners is 90 degrees, it is a fact that all the other corners would be 90 degrees as well.




What you say is only true is the quadrlateral has all side of equal lenth. Having one angle be 90° does not mean all the other angles have to be 90° also. 2 sides are parellel not the other 2, if they were we could start to figure out the angles.
Link Posted: 2/7/2006 5:58:18 PM EDT
"I'll take Quadrilaterals for $100 Alex."
Link Posted: 2/7/2006 5:58:26 PM EDT

Originally Posted By 1GUNRUNNER:

Originally Posted By Magurgle:
Here is a VERY BAD graphic representation of that he is talking about using only the keyboard

_____
|_____\

Fill in the gaps and you have what he is discribing





THANK YOU!

Does this shape have a name?



I can't recall any 'name' for it other than trapizoid.
Link Posted: 2/7/2006 5:59:39 PM EDT
[Last Edit: 2/7/2006 6:02:25 PM EDT by danonly]

Originally Posted By Magurgle:

Originally Posted By 1GUNRUNNER:

Originally Posted By Magurgle:
Here is a VERY BAD graphic representation of that he is talking about using only the keyboard

_____
|_____\

Fill in the gaps and you have what he is discribing





THANK YOU!

Does this shape have a name?



I can't recall any 'name' for it other than trapizoid.




a kite
?

nah, isosceles trapezoid
Link Posted: 2/7/2006 6:03:25 PM EDT
[Last Edit: 2/7/2006 6:04:36 PM EDT by twl]
Link Posted: 2/7/2006 6:03:28 PM EDT
That shape is a trapezoid. The shape usually associated with the word trapezoid is in fact an isosceles trapezoid.
Link Posted: 2/7/2006 6:03:45 PM EDT
[Last Edit: 2/7/2006 6:04:43 PM EDT by 1GUNRUNNER]
Link Posted: 2/7/2006 6:03:50 PM EDT
It is a trapezoid.
Link Posted: 2/7/2006 6:04:38 PM EDT
[Last Edit: 2/7/2006 6:09:07 PM EDT by AeroE]
No matter what else it is, it's a quadrilateral, which is any enclosed shape with four sides.

Here are some examples -
regentsprep.org/Regents/math/quad/LQuad.htm

mathforum.org/dr.math/faq/formulas/faq.quad.html
Link Posted: 2/7/2006 6:09:26 PM EDT
[Last Edit: 2/7/2006 6:16:32 PM EDT by danonly]

Originally Posted By 1GUNRUNNER:
Ok the vertical height A=30", the length of the angle B=42" With that info can you tell me what C&D are?

D

___

A |__\ B

C



well you can get the other leg of the triangle (sqrt864=29.4), but to get D i don't know.

oops, dumb error

Link Posted: 2/7/2006 6:09:29 PM EDT
C = D+29.4 in.
Link Posted: 2/7/2006 6:12:22 PM EDT
[Last Edit: 2/7/2006 6:14:02 PM EDT by AeroE]

Originally Posted By 1GUNRUNNER:
Ok the vertical height A=30", the length of the angle B=42" With that info can you tell me what C&D are?

D

___

A |__\ B

C




No, insufficient information. However, the minimum that C can be is zero.

So,

D = C + [42^2 - 30^2]^(1/2) = C + 29.4 as someone else already posted above.
Link Posted: 2/7/2006 6:16:36 PM EDT
Link Posted: 2/7/2006 6:18:23 PM EDT
[Last Edit: 2/7/2006 6:20:56 PM EDT by danonly]

Originally Posted By 1GUNRUNNER:

Originally Posted By 1GUNRUNNER:
Ok the vertical height A=30", the length of the angle B=42" With that info can you tell me what C&D are?

D

___

A |__\ B

C



Ok here is what I get by rough measuring A=30" B=42" C=77.375" D=47.25"

Does that compute?



C and D can be whatever you want (larger than 0)- there are no proportions or other info to check them.


but close enough, since 47.25 + 29.4 = 76.65

which if someone was kinda rough on the tape measure would be close enough to 77 3/8 for gubmint work


Link Posted: 2/7/2006 6:20:40 PM EDT
Indiana, of course.
Link Posted: 2/7/2006 6:22:21 PM EDT
Link Posted: 2/7/2006 6:23:44 PM EDT
Link Posted: 2/7/2006 6:25:11 PM EDT
B = squareroot( A^2 + (C-D)^2)
Link Posted: 2/7/2006 6:34:39 PM EDT
[Last Edit: 2/7/2006 6:36:37 PM EDT by npd233]

Originally Posted By 1GUNRUNNER:
With A,C, and D can you verify that B would be correct?



Yes. For a basic quadrilateral you'll need three measurements to determine #4.

And, FWIW, it's not an Irregular Quadrilateral, it's just a Quadrilateral.

The "shape" does not have a geometrical name.

regentsprep.org/Regents/math/quad/LQuad.htm


So, where's the plot of land you're trying to determine acreage for?
Link Posted: 2/7/2006 6:51:04 PM EDT
Link Posted: 2/7/2006 6:57:28 PM EDT
[Last Edit: 2/7/2006 7:00:07 PM EDT by npd233]

Originally Posted By 1GUNRUNNER:

Originally Posted By npd233:

So, where's the plot of land you're trying to determine acreage for?



Mirror for my new mini-bar.



Tin Foil is shiny and you don't really have to measure it. Just staple it up and use a razor blade to trim it.
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