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OpenStudy (anonymous):
Find the approximate value of b in the triangle shown.
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OpenStudy (anonymous):
https://clackamasweb.owschools.com/media/g_geo_ccss_2014/11/geo_10a_8_assess_media_2.gif
OpenStudy (anonymous):
answers are a. 13 b. 12 c. 8 d. 5
OpenStudy (anonymous):
i think the answer is 5
OpenStudy (amoodarya):
use "cos" law \[a^2+c^2-b^2=2a*c *\cos(B)\\a^2+c^2-2a*c*\cos(B)=b^2\\12^2+10^2-2(10)(12)\cos(24)=b^2\] can you find b?
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