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    Hey please look at the attachment thank you. x
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    (Original post by User23)
    Hey please look at the attachment thank you. x
    Angle between north and LA = 70 degrees.

    Angle between LA and LB = 210 - 70 = 140 degrees.

    You now know an angle with two sides; use the cosine rule to find AB.
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    (Original post by User23)
    Hey please look at the attachment thank you. x
    Well you're given measurement of two sides, and also two angles, so use cosine rule
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    (Original post by ombtom)
    Angle between north and LA = 70 degrees.

    Angle between LA and LB = 210 - 70 = 140 degrees.

    You now know an angle with two sides; use the cosine rule to find AB.
    wait i dont know how u got the angle between LA and LB?
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    (Original post by ombtom)
    Angle between north and LA = 70 degrees.

    Angle between LA and LB = 210 - 70 = 140 degrees.

    You now know an angle with two sides; use the cosine rule to find AB.
    Is this it?
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    (Original post by User23)
    Is this it?
    That's exactly right. If you add 70 and 140, you get 210.
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    (Original post by ombtom)
    That's exactly right. If you add 70 and 140, you get 210.
    ok cool thanks x
 
 
 
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