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11th Class Part 1 Mathematics Chapter 12 Test Online MCQs With Answers
Question # 1
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 # 2
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 # 3
In a right isoceles triangle, one acute angle is:
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30°
45°
60°
75°
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Question # 4
r r
1
r
2
r
3
=
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abc
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Question # 5
A circle drawn inside a triangle and touching its sides is known as:
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Question # 6
With usual notations for triangle R equals:
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Question # 7
In any triangle ABC, law of tangents is:
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all of these
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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
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Question # 10
In triangle ABC, If Γ = 90° then:
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b = c + a
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Question # 11
The circum-radius R of a triangle is given by:
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Question # 12
A triangle which is not right angle triangle called ________ triangle:
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acute
obtuse
right
oblique
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Question # 13
r
2
=
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Question # 14
In a triangle ABC if a
2
- b
2
+ c
2
= ac then < ß =
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Question # 15
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r
1
r
2
r
3
r
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Question # 16
If 2s = a + b + c, then in any triangle ABC:
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all of these
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Question # 17
If triangle ABC, If ß = 90° then:
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none of these
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