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In the figure above, three right triangles have a common vertex. Then

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In the figure above, three right triangles have a common vertex. Then  [#permalink]

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New post 27 Jul 2017, 01:48
00:00
A
B
C
D
E

Difficulty:

  15% (low)

Question Stats:

90% (00:24) correct 10% (00:16) wrong based on 45 sessions

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Re: In the figure above, three right triangles have a common vertex. Then  [#permalink]

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New post 27 Jul 2017, 01:57
Bunuel wrote:
Image
In the figure above, three right triangles have a common vertex. Then x + y + z =

(A) 90
(B) 120
(C) 135
(D) 180
(E) 270


Attachment:
2017-07-27_1246.png


x+y+z + 3*90 = 360 (sum of all the angles around a point is 360 degrees )
=> x+y+z = 90

Answer A
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Re: In the figure above, three right triangles have a common vertex. Then  [#permalink]

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New post 27 Jul 2017, 02:25
360 -270. Because total is 360 and the sum of the right angles is 90+90+90.


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Re: In the figure above, three right triangles have a common vertex. Then  [#permalink]

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New post 27 Jul 2017, 03:46
Bunuel wrote:
Image
In the figure above, three right triangles have a common vertex. Then x + y + z =

(A) 90
(B) 120
(C) 135
(D) 180
(E) 270


Attachment:
2017-07-27_1246.png


90*3 = 270
360-270 = 90
A
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Re: In the figure above, three right triangles have a common vertex. Then   [#permalink] 27 Jul 2017, 03:46
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In the figure above, three right triangles have a common vertex. Then

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