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In the figure above, if CAB is a right angle, then x =

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Math Expert
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In the figure above, if CAB is a right angle, then x =  [#permalink]

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New post 05 Sep 2017, 23:40
00:00
A
B
C
D
E

Difficulty:

  15% (low)

Question Stats:

97% (01:04) correct 3% (00:48) wrong based on 53 sessions

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Math Expert
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Posts: 7556
Re: In the figure above, if CAB is a right angle, then x =  [#permalink]

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New post 06 Sep 2017, 04:03
Bunuel wrote:
Image
In the figure above, if CAB is a right angle, then x =

(A) 38
(B) 40
(C) 42
(D) 45
(E) 48

Attachment:
2017-09-06_1033_002.png



Let the point on BC from A be at D..
Now angle X = angle CAB - angle CAD= 90-angle CAD

In ∆ACD, angle C + angle CAD =90 or angle CAD=90-42

So x = 90-(90-42)=42

C
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Re: In the figure above, if CAB is a right angle, then x =  [#permalink]

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New post 11 Sep 2017, 10:59
Bunuel wrote:
Image
In the figure above, if CAB is a right angle, then x =

(A) 38
(B) 40
(C) 42
(D) 45
(E) 48

Attachment:
2017-09-06_1033_002.png



Let the vertex of the right angle on BC be D. We see that angle DAC = 180 - 90 - 42 = 48.

Since angle CAB = 90 and angle DAC = 48, angle BAD = x = 90 - 48 = 42.

Answer: C
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Re: In the figure above, if CAB is a right angle, then x =   [#permalink] 11 Sep 2017, 10:59
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In the figure above, if CAB is a right angle, then x =

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