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Geometry 7

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by coolhabhi » Sun Jun 10, 2012 3:18 am
Image

From the image we can say x + (180 - y) + 50 = 180 (Since the angles in a triangle must add up to to 180)
=> x - y + 50 = 0
=> y = x + 50

Answer B
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Master | Next Rank: 500 Posts
Posts: 141
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by coolhabhi » Sun Jun 10, 2012 3:35 am
Image

I have done it this way.

8/sin90 = 4/sin3b
(This is by this rule:
Image)

=>sin3b = 1/2
=> 3b = 30
=> b = 10

Since 3b is 30 then 10 should be 60
=> 10a = 60
=> a = 6
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