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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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