DIRECTIONS: Choose the correct answer. Write the letter of your answer on the space before the number.
_____ 1. Applying the Law of Sines in any triangle ABC, what is x? sin A/a = sin B/b = x
a. sin C/c b. sin C/a
c. sin C/b d. sin D/d
_____ 2. Which is not a possible case in solving oblique triangle?
a. Given two angles and the side opposite one of them
b. Given two angles and the included side
c. Given one side and one angle
d. Given the three sides
_____ 3. It is a triangle which does not contain any right angle.
a. acute triangle
b. right triangle
c. obtuse triangle
d. oblique triangle
For items number 4-6. Using Law of Sines, solve for the triangle described below. a=6, A=42° , C = 70°
____4. Solve for side c
a. c = 8.43 b. c=7.53 c. c=15.23 d. c=34.8
____5. Solve for angle B
a. B=70° b. B=68° c. C= 70° d. C=68°
____6. Solve for side b
a. b=22 b. b=36.25 c. b=8.31 d. 3.28
____7. The vertex angle of an isosceles triangle is 40°. If the base of the triangle is 18cm, find its perimeter.
a. 26.31 cm b. 70.63 cm c. 62.70cm d. 53.26cm
____8. The measures of two of the angles are 50° and 55°. If the longest side measures 17cm, find the perimeter of the triangle.
a. 33.9 cm b. 39.3cm c. 44.9cm d. 49.4cm
_____ 9. Triangle XYZ is a non-right triangle. If XY measures 20cm, XZ measures 15 cm and ∠Z measures 35º then what is the measure of ∠Y?
a. 25.84º b. 24.85º c. 25.48º d. 24.58º
_____ 10. What kind of triangles can be considered as oblique triangle?
a. acute triangle c. both a & b b. obtuse triangle d. none of the above