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sat 1

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sorry for getting late :p

look the shaded region is a quadrilateral. So the sum of all its side will be equal to 360.
We are given x+y = 80, so the sum of the other two angles in this quadrilateral will be equal to 360-80= 280.
As it is given in the question that all angles of the polygon are equal so one interior angles on the polygon will be 280/2 = 140.

now apply the formula : interior angle = (n-2)*180 / n

140 = (n-2)*180/n

after solving you'll get :

n=9

So the answer is B.

:p Hope I explained it well
 
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M
sorry for getting late :p

look the shaded region is a quadrilateral. So the sum of all its side will be equal to 360.
We are given x+y = 80, so the sum of the other two angles in this quadrilateral will be equal to 360-80= 280.
As it is given in the question that all angles of the polygon are equal so one interior angles on the polygon will be 280/2 = 140.

now apply the formula : interior angle = (n-2)*180 / n

140 = (n-2)*180/n

after solving you'll get :

n=9

So the answer is B.

:p Hope I explained it well
My God! I forgot we had formulas :x
Thanks! God bless ^_^
 
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I think it's 180.

As from the diagram 3w = 2L

so W = 2/3 L

Area of one tile = L * 2/3L = 2/3L^2

Area of rectangular region to be covered = 10L * 12L = 120L^2

so,

no. of tiles = (120L^2) / (2/3L^2) = 180

Answer is E.
Thank youuu! *_*
Last one. Pliss. upload_2015-12-31_23-49-4.png
 
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Visualize the options like this:

(a) -50 < h - 10 < 50
(b) -40 < h - 20 < 40
(c) -20 < h- 30 < 20
(d) -10 < h-40 < 10
(e) -5 < h-45< 5

Now solve every option.

Only option D will give you the height range that is :

30 < h < 50
 
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Visualize the options like this:

(a) -50 < h - 10 < 50
(b) -40 < h - 20 < 40
(c) -20 < h- 30 < 20
(d) -10 < h-40 < 10
(e) -5 < h-45< 5

Now solve every option.

Only option D will give you the height range that is :

30 < h < 50
Ohkayz! Smart enough! Thanksss! ^_^
 
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One of the coordinates would be (0,0)
The other one you can assume from the coordinates (8,3), taking for instance (8,1 ) then find the gradient
This coordinate with (0,0) will produce a line that is below line l and passes through A and B
 
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One of the coordinates would be (0,0)
The other one you can assume from the coordinates (8,3), taking for instance (8,1 ) then find the gradient
This coordinate with (0,0) will produce a line that is below line l and passes through A and B
Ohhhhh. Thank youuu! :D
 
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