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11th Class Part 1 Mathematics Chapter 12 Test Online MCQs With Answers
Question # 1
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r
1
r
2
r
3
r
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Question # 2
When two sides and included angle is given, then area of triangle is given by:
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all of these
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Question # 3
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right angled
equilateral
isosceles
obtuse angled
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Question # 4
r
2
=
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Question # 5
In a triangle ABC if a
2
- b
2
+ c
2
= ac then < ß =
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Question # 6
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 # 7
In any triangle ABC, law of sines is:
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Question # 8
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Question # 9
A circle drawn inside a triangle and touching its sides is known as:
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Question # 10
r r
1
r
2
r
3
=
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abc
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Question # 11
If triangle ABC, If ß = 90° then:
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none of these
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Question # 12
If 2s = a + b + c, then in any triangle ABC:
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all of these
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Question # 13
In triangle the length of the sides are 7, 4√3 and √13. Then the smallest angle is:
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15°
30°
60°
45°
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Question # 14
In a right isoceles triangle, one acute angle is:
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30°
45°
60°
75°
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Question # 15
In triangle ABC, if α = 90° then:
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none of these
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Question # 16
A circle passing though the vertices of a triangle is known as:
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Question # 17
The in-radius r of a triangle is given by:
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