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11th Class FA Mathematics Chapter 12 Online Test MCQs With Answers
Question # 1
In triangle ABC, If Γ = 90° then:
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b = c + a
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Question # 2
r
1
=
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Question # 3
The lengths of the sides of a triangle are proportional to the sines of the opposite angles to the sides. This is known as:
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The law of sines
The law of cosines
The law of tangents
The fundamental law
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Question # 4
If triangle ABC, If ß = 90° then:
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none of these
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Question # 5
A circle which touches one side of a triangle externally and the other two produces sides internally is known as:
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Question # 6
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right angled
equilateral
isosceles
obtuse angled
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Question # 7
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3:5:2
3:2:1
1:2:3
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Question # 8
If α, ß, Γ are the angles of a oblique triangle, then:
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α = 90°
ß = 90°
Γ = 90°
none of these
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Question # 9
If the elevation of the sun is 30°, the length of the shadow cast by a tower of 150m height is:
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none
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Question # 10
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Question # 11
With usual notations for triangle R equals:
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Question # 12
A circle drawn inside a triangle and touching its sides is known as:
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Question # 13
In any triangle ABC, law of cosines is:
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Question # 14
In a triangle ABC, (s - a)(s - b) = s(s - c), then the angle Γ =
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Question # 15
The circum-radius R of a triangle is given by:
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Question # 16
In any triangle ABC, law of sines is:
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Question # 17
r r
1
r
2
r
3
=
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abc
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