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# In ΔABC above, x =

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Math Expert
Joined: 02 Sep 2009
Posts: 55803
In ΔABC above, x =  [#permalink]

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25 Dec 2018, 08:03
00:00

Difficulty:

15% (low)

Question Stats:

90% (00:30) correct 10% (00:47) wrong based on 23 sessions

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In ΔABC above, x =

A. 20
B. 30
C. 40
D. 50
E. 60

Attachment:

2018-12-25_1902.png [ 9.1 KiB | Viewed 287 times ]

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In ΔABC above, x =  [#permalink]

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25 Dec 2018, 08:19
Bunuel wrote:

In ΔABC above, x =

A. 20
B. 30
C. 40
D. 50
E. 60

Attachment:
2018-12-25_1902.png

Difficulty Level: 550

Sum of interior angles of a triangle = 180

then sum of angles = $$\frac{x}{2}$$+ x + 3x

Let suppose x=2

Then by putting value of x we have 1 + 2 + 6 = 9 => 180/9 = 20

1=20 and x=2 so angle x = 20*2 = 40

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Re: In ΔABC above, x =  [#permalink]

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25 Dec 2018, 09:06
Bunuel wrote:

In ΔABC above, x =

A. 20
B. 30
C. 40
D. 50
E. 60

Attachment:
2018-12-25_1902.png

9x=180*2

x= 40
IMO C
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Re: In ΔABC above, x =   [#permalink] 25 Dec 2018, 09:06
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