#hi

8 messages · Page 1 of 1 (latest)

zenith cairn
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Cosine rule

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that’s a hint

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@zinc brook try get an angle at the top.

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What do you know about co interior angles and angles around a point

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You could go about that way

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Right so co interior angles add up to 180

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So the angle to the left of 130 will be 140

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you can then use angles on a point and cosine rule