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November 26, 2014

November 26, 2014

Posted by **lelelelel** on Wednesday, December 1, 2010 at 7:37pm.

- pre calculus -
**bobpursley**, Wednesday, December 1, 2010 at 7:41pmI assume you have had trig. Draw the figure. if it has a 70 degree acute angle, the other angle is 110.

Use the law of cosines:

shortdiag^2=6^2+7^2-2*6*7Cos70

longdiag^2=6^2+7^2-2*6*7Cos110

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