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OpenStudy (gallanth):
Find the measure of angle D. Round to the nearest tenth.
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OpenStudy (gallanth):
OpenStudy (tuskforever):
You use the cosines for sss. Because you are trying to find angle D start with (next post)
OpenStudy (tuskforever):
https://www.mathsisfun.com/algebra/trig-solving-sss-triangles.html Here is a link to help you through the rest so you can study and better understand for future problems.
OpenStudy (tuskforever):
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OpenStudy (tuskforever):
cos D = (f2 + e2 − d2) / 2fe Now you just fill in the blanks and it will be solved.
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OpenStudy (tuskforever):
You can even solve each step on here and I will let you know if you're right
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