OpenStax, Algebra and Trigonometry 2e §10.2 Non-right Triangles: Law of Cosines · Exercise 28 · Trigonometry · Laws of sines & cosines
Non-right Triangles: Law of Cosines · Exercise 28
Use Heron’s formula to find the area of the triangle. Round to the nearest hundredth.
Find the area of a triangle with sides of length 20 cm, 26 cm, and 37 cm. Round to the nearest tenth.
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OpenStax, Algebra and Trigonometry 2e · §10.2 Non-right Triangles: Law of Cosines · Exercise 28
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