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August 21, 2014

August 21, 2014

Posted by **Anonymous** on Wednesday, November 3, 2010 at 5:15pm.

- geometry -
**Reiny**, Wednesday, November 3, 2010 at 5:21pmWhy are you shouting?

You could use the Sine Law

let the missing side by x

x/sin45 = 5/sin67.5

x = 5sin45/sin67.5 = 3.827

you could also use the Cosine Law:

x^2 = 5^2 + 5^2 - 2(5)(5)cos45

= 50 - 35.35534

= 14.6447

x = √14.6447 = 3.827

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