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LEARNING TASK 3 Directions: Choose the letter that corresponds to the correct answer.
For items 1-3: In an oblique ΔABC, <A = 50°, <B = 70° and AC = 10
1. What is the measure of 2C?
a. 50°
b. 60°
c. 70°
d. 80°
2. What rule/law must be used to solve BC?
a. Law of Cotangent
b. Law of Secant
c. Law of Cosine
d. Law of Sine
3. Which of the following equations will lead to solve BC?
a. 10/sin100=BC/sin50
b. 10/sin50=BC/sin70
c. 10/sin180=BC/sin70
d. 10/sin70=BC/sin50
4. Which of the following describes the Law of Cosines?
a. The third side of a triangle equals the sum of the squares of the other two sides minus the product of the two sides and an included angle.
b. The square third side of a triangle equals the sum of the squares of the other two sides minus the product of the two sides and an included angle.
c. The square third side of a triangle equals the sum of the squares of the other two sides minus the product of the two sides and an included angle.
d. None of the above
5. What is the measure of LA in AABC with sides a = 8, b = 10 and C = 85°?
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