Question about The Office Equipment & Supplies

# 3 known dimensions of lines,2 angles are 90 degrees what is the 3rd angle

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Posted on Jan 02, 2017

Undid the RH fence-bolt in the table behind the fence and tapped the end of the fence forward to make it perpendicular to the blade. Tighten bolt. When you look down on the two fence bolt heads, one is easy to rotate with a socket wrench, the LH bolt head would be very, very difficult to move. Undo the RH bolt to swing the fence angle WRT the blade.

Posted on Apr 09, 2009

SOURCE: I have a irregular triagle

use general Pitagora's theorem ( if you can not just make the measurements) ...I mean get the long one on the ground ..and after that measure with a protractor the angle ..and draw the second one ..when you draw a line from the ends of the 2 of them you will have the 3rd.
or ..this is the Pitagora's theorem in general cases..
BC2=AB2+AC2-2*AB*AC*cosA
meaning

BC2 =48.6sqre+66sqre -2 x 48.6 x 66 x R(3)/2 whwre R(3) is the square root from 3 and R(3)/2 is the cos 30"
and will be with approximation
BC=24.44

Posted on Jan 03, 2011

It is called as keystone distortion. To correct the problem press the "Keystone" button on the projector, then press left, right, down & up arrow buttons to adjust the angle at 90 degrees.

Posted on Aug 15, 2011

45 tan(37) or about 39.1 feet.

Posted on Mar 29, 2014

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### How many angles does a regular polygon have when its interior angle is 176 degrees

Lots and lots and lots. When you think the angle is nearly 180 degrees or a straight line, it must have lots and lots of sides.

The total of the interior angles of a polygon is given by (n-2)180, so the angle of each interior angle of a regular polygon is given by ((n-2)180)/n.

Now we set this to be equal to 176 and solve for n.
(n-2)180 = 176
-----------
n

Multiplying both sides by n, we get (n-2) 180 = 176n

Expanding the left side of the equation, 180n - 360 = 176n

Subtracting 176n from both sides and adding 360 to both sides, we get

180n - 176n = 360

4n = 360

Dividing both sides by 4, n = 90

Thus, you need a regular polygon of 90 sides to get an internal angle of 176 degrees.

Hopefully you don't have to construct it.

Good luck,

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Mar 26, 2017 | Homework

### How many sides does a regular polygon have when the interior degrees is 176?

Lots and lots and lots. When you think the angle is nearly 180 degrees or a straight line, it must have lots and lots of sides.

The total of the interior angles of a polygon is given by (n-2)180, so the angle of each interior angle of a regular polygon is given by ((n-2)180)/n.

Now we set this to be equal to 176 and solve for n.
(n-2)180 = 176
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n

Multiplying both sides by n, we get (n-2) 180 = 176n

Expanding the left side of the equation, 180n - 360 = 176n

Subtracting 176n from both sides and adding 360 to both sides, we get

180n - 176n = 360

4n = 360

Dividing both sides by 4, n = 90

Thus, you need a regular polygon of 90 sides to get an internal angle of 176 degrees.

Hopefully you don't have to construct it.

Good luck,

Paul

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### How can you classify a triangle according to it angle? is there a formula for it

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So, now we talk about angles: a Right trianlge has one angle that is 90 degrees, an Obtuse triangle has one angle greater than 90 degrees, and an Acute has no angles over 90 degrees.
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### What are perpendicular lines

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I am including a few screen capture to help you do the graph.
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Set the correct angle unit. By default, after the NewProb command the angle unit is reset to Radian. If you want something else change it. See picture. Select 1:radian or 2:Degree.

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Here are the window dimension that gave this picture

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As you can see I played with the window dimensions (Xmin=-3*180=-540 and Xmax=3*180=540. The Xscale factor was set to 90 and the range of y-values was reduced to -1.2 to 1.2)

Here is what you get

Before hitting the Graph sequence make sure that the function to be drawn has a check mark to its left (see the 3rd screen capture from the top).

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### I am getting the wrong answers with the tan -1 function

Hello,
That habit of TI, Casio, and Sharp to label the inverse trigonometric functions with the -1 superscript can cause confusions.
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4. In this calculator arcosine (x) gives results between 0 and 180 degrees (if angle MODE is Degree) or between 0 and Pi radians (if angle MODE is Radian).
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