Class 9 Mathematics · Chapter 6 · Test 4
Solution of Triangles
40 MCQs
40 questions · 35 min · 40 marks
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Sample questions
The first 5 of 40. Try each one, then tap to see the answer.
Question 1
Finding the measures of the remaining elements of a triangle is called:
- Aconstruction of the triangle
- Bsolution of the triangle
- Ccongruence
- Dsimilarity
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Answer: B
This process is called the solution of a triangle.
Question 2
To solve a triangle we need at least three elements including:
- Atwo angles
- Bthree angles
- Cno side
- Dat least one side
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Answer: D
At least one side must be known.
Question 3
In a right triangle ABC with B = 90° and A = 30° and a = 2 the angle C is:
- A60°
- B30°
- C45°
- D90°
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Answer: A
C = 90° − 30° = 60°.
Question 4
In the same triangle the hypotenuse b equals:
- A2
- B3
- C4
- D1
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Answer: C
sin 30° = 2/b so b = 4.
Question 5
In the same triangle the side c equals:
- A4
- B2√3
- C2
- D√3
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Answer: B
tan 30° = 2/c so c = 2√3.
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