The Sin Rule (2)Author: Math ELS Description: Note that: the fraction a over b is written as a/b Keywords: shicko, sin rule, els, , , , online teaching
Content: Quiz: 1. In any ∆ ABC 2b /sin B = ........ r A) 1 B) 2 C) 4 D) √2
2. Area of the equilateral triangle whose
side length = 6 cm is ……. A) 18 B) 18√3 C) 9 D) 9√3
3. ABC is an isosceles triangle of side length 20√3 cm, then the length of the diameter of the circumcircle of this triangle equals ………… cm A) 10 B) 20 C) 40 D) 20√3
4. If the length of the radius of the circumcircle of ∆ ABC
is 6 cm, m(∠A)=30° , then a = ……… cm A) 12 B) 6 C) 12√3 D) 6√3
5. In any ∆ ABC, 2r sin C = ………… A) a B) b C) c D) 1
6. n any ∆ ABC, r sinB = ………… A) ½ b B) b C) 2b D) ½
7. If the length of the diameter of the circumcircle of
∆ ABC is 10 cm, m(∠B)=30° , then b = ……… cm A) 10 B) 5 C) 10√3 D) 5√3
8. In ∆ XYZ, if sinX = 2 sinY = 3 sinZ ,
then x : y : z = ……….. A) 1 : 2 : 3 B) 3 : 2 : 1 C) 6 : 3 : 2 D) 2 : 3 : 6
9. In ∆ XYZ, if 2 sinX = 3 sinZ = 4 sinY ,
then x : y : z = ……….. A) 6 : 4 : 3 B) 6 : 3 : 4 C) 2 : 3 : 4 D) 4 : 3 : 2
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