1. If the measure of angle A of triangle ABC is 3x, the measure of angle B is 5x, and the measure of angle C is 4x, what is the value of x. a. 12 b. 15 c. 20 d. 30 2. In right triangle ABC, DE ? BC. If AB=3, AC=4, BC=5, and DE = 2, find EC. A. 2 2/3 B. 3 C. 2 3/8 D. 10
Added by Joshua C.
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So, we can set up the equation 3x + 5x + 4x = 180. Solving this equation gives us x = 180/12 = 15. So, the value of x is 15. Show more…
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