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Mathematics Fsc Part 1 Chapter 12 Online Test MCQs With Answers
Question # 1
If 2s = a + b + c, where a, b, c are the sides of a triangle ABC, then area of triangle ABC is given by:
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Question # 2
The circum-radius R of a triangle is given by:
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Question # 3
The in-radius r of a triangle is given by:
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Question # 4
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Question # 5
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right angled
equilateral
isosceles
obtuse angled
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Question # 6
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r
1
r
2
r
3
r
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Question # 7
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 # 8
r
3
=
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Question # 9
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Question # 10
With usual notations for triangle R equals:
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Question # 11
r r
1
r
2
r
3
=
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abc
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Question # 12
A circle passing though the vertices of a triangle is known as:
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Question # 13
In a triangle ABC b = √3, c = 1, α = 30° then a = :
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2
1
3
-1
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Question # 14
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 # 15
If triangle ABC, If ß = 90° then:
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none of these
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Question # 16
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Question # 17
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 # 18
In any triangle ABC, law of sines is:
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Question # 19
A triangle which is not right angle triangle called ________ triangle:
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acute
obtuse
right
oblique
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Question # 20
r
1
=
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