OpenStax, Algebra and Trigonometry 2e §10.2 Non-right Triangles: Law of Cosines · Exercise 30 · Trigonometry · Laws of sines & cosines

Non-right Triangles: Law of Cosines · Exercise 30

Use Heron’s formula to find the area of the triangle. Round to the nearest hundredth.

$a = 12.4 ft, b = 13.7 ft, c = 20.2 ft$

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OpenStax, Algebra and Trigonometry 2e · §10.2 Non-right Triangles: Law of Cosines · Exercise 30

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