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Constructions Class 9 MCQs Questions with Answers
Construction Class 9 MCQ Chapter 11 Question 1.
If a, b and c are the lengths of the three sides of a triangle, then which of the following is true?
(a) a + b < c
(b) a – b < c
(c) a + b = c
Answer
Answer: (b) a – b < c
Construction MCQ Class 9 Chapter 11 Question 2.
With the help of a ruler and compasses, which of the following is not possible to construct?
(a) 70°
(b) 60°
(c) 135°
Answer
Answer: (a) 70°
Class 9 Construction MCQ Chapter 11 Question 3.
Which of the following sets of angles can be the angles of a triangle?
(a) 30°, 60°, 80°
(b) 40°, 60°, 70°
(c) 50°, 30°, 100°
Answer
Answer: (c) 50°, 30°, 100°
Class 9 Maths Chapter 11 MCQ Question 4.
The construction of the triangle ABC is possible if it is given that BC = 4 cm, ∠C = 60° and the difference of AB and AC is
(a) 3.5 cm
(b) 4.5 cm
(c) 3 cm
(d) 2.5 cm
Answer
Answer: (b) 4.5 cm
Class 9 Maths Ch 11 MCQ Question 5.
Which of the following can be the length of BC required to construct the triangle ABC such that AC = 7.4 cm and AB = 5 cm?
(a) 3.5 cm
(b) 2.1 cm
(c) 4.7 cm
Answer
Answer: (b) 2.1 cm
Constructions Class 9 MCQ Chapter 11 Question 6.
If we want to construct a triangle, given its perimeter, then we need to know:
(a) Sum of two sides of triangle
(b) Difference between two sides of triangle
(c) One base angles
(d) Two base angles
Answer
Answer: (c) One base angles
MCQ On Constructions Class 9 Chapter 11 Question 7.
To construct a bisector of a given angle, we need:
(a) A ruler
(b) A compass
(c) A protractor
(d) Both ruler and compass
Answer
Answer: (d) Both ruler and compass
Class 9 Maths Chapter 11 MCQ With Answers Question 8.
Which of the following set of lengths can be the sides of a triangle?
(a) 2 cm, 4 cm, 1.9 cm
(b) 1.6 cm, 3.7 cm, 5.3 cm
(c) 5.5 cm, 6.5 cm, 8.9 cm
(d) None of the above
Answer
Answer: (c) 5.5 cm, 6.5 cm, 8.9 cm
MCQ Of Construction Class 9 Chapter 11 Question 9.
Which of these angles cannot be constructed using ruler and compasses?
(a) 120
(b) 60
(c) 140
(d) 135
Answer
Answer: (c) 140
MCQ Questions For Class 9 Maths Ncert Chapter 11 Question 10.
Which of the following angles can be constructed using ruler and compasses?
(a) 35
(b) 45
(c) 95
(d) 55
Answer
Answer: (b) 45
Hint:
See the figure below:
ROA = 45°
Construction Class 9 MCQ With Answers Chapter 11 Question 11.
With the help of a ruler and compasses which of the following is not possible to construct?
(a) 120°
(b) 135°
(c) 140°
Answer
Answer: (c) 140°
Class 9 Chapter 11 MCQ Question 12.
If the construction of a triangle ABC in which AB = 6 cm, ∠A = 70° and ∠B = 40° is possible then find the measure of ∠c.
(a) 40°
(b) 70°
(c) 80°
Answer
Answer: (b) 70°
MCQ Questions For Class 9 Maths Chapter 11 Question 13.
Which of the following set of lengths can be the sides of a triangle?
(a) 2 cm, 4 cm, 1.9 cm
(b) 5.5 cm, 6.5 cm, 8.9 cm
(c) 1.6 cm, 3.7 cm. 5.3 cm
Answer
Answer: (b) 5.5 cm, 6.5 cm, 8.9 cm
Question 14.
The construction of a triangle ΔABC in which BC = 6 cm, ∠A = 50° is not possible, when difference of BC and AC is equal to
(a) 4.6 cm
(b) 6.4 cm
(c) 5.1 cm
Answer
Answer: (b) 6.4 cm
Question 15.
Which of the following angle can be constructed with the help of a ruler and a pair of compasses?
(a) 35°
(b) 40°
(c) 37.5°
(d) 47.5°
Answer
Answer: (c) 37.5°
Question 16.
To construct an angle of 60 degrees, we need to draw first:
(a) A ray
(b) An arc
(c) Two rays
(d) A straight line
Answer
Answer: (a) A ray
Hint:
To construct an angle of 60 degrees we need to start at the initial point of a ray.
Question 17.
The side lengths 4 cm, 4 cm and 4 cm can be sides of:
(a) Scalene Triangle
(b) Isosceles Triangle
(c) Equilateral Triangle
(d) None of the above
Answer
Answer: (c) Equilateral Triangle
Hint:
Equilateral triangle has all its three sides equal.
Question 18.
If a, b and c are the lengths of three sides of a triangle, then:
(a) a + b > c
(b) a – b > c
(c) a + b = c
(d) a – b = c
Answer
Answer: (a) a + b > c
Hint:
The sum of two sides of a triangle is always greater than the third side.
Question 19.
Which of these angles we cannot construct it using ruler and compasses?
(a) 120
(b) 70
(c) 60
(d) All can be constructed
Answer
Answer: (b) 70
Question 20
Which of the following angles can be constructed using ruler and compass?
(a) 35
(b) 40
(c) 90
(d) 50
Answer
Answer: (c) 90
Hint:
See the figure below:
∠POA = 90
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