For 14, find the area of the indicated triangle. Acute, Right, or Obtuse Problem: The
Chapter 6, Problem 18(choose chapter or problem)
For 14, find the area of the indicated triangle. Acute, Right, or Obtuse Problem: The law of cosines states that in XYZ, x2 = y2 + z2 2yz cos X a. Explain how the law of cosines allows you to make a quick test to see if angle X is acute, right, or obtuse, as shown: b. Without using your calculator, find whether angle X is acute, right, or obtuse if x = 7 cm, y = 5 cm, and z = 4 cm.
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