**MCQs on Class 9 Constructions**

**1) Which of the following angles can be constructed using ruler and compass?**

a. 35

b. 40

c. 90

d. 50

Answer:** c**

**2) Which of the following angles can be constructed using ruler and compasses?**

a. 35

b. 45

c. 95

d. 55

Answer:** b**

**3) Which of these angles we cannot construct it using ruler and compasses?**

a. 120

b. 70

c. 60

d. All can be constructed

Answer:** b**

**4) Which of these angles cannot be constructed using ruler and compasses?**

a. 120

b. 60

c. 140

d. 135

Answer:** c**

**5) 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:** a**

Explanation: The sum of two sides of a triangle is always greater than the third side.

**6) 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:** c**

**7) The side lengths 4cm, 4cm and 4cm can be sides of:**

a. Scalene Triangle

b. Isosceles Triangle

c. Equilateral Triangle

d. None of the above

Answer:** c**

Explanation: Equilateral triangle has all its three sides equal.

**8) 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:** d**

**9) 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:** a**

Explanation: To construct an angle of 60 degrees we need to start at the initial point of a ray.

**10) 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:** d**