Learn Maths Constructions, Class 9 Maths Constructions Exercise, Free Online Constructions Lessons

Class 9 Maths Study Material

An Educational platform for Preparation and Practice Class 9. Kidsfront provide unique pattern of learning Maths with free online comprehensive study material in the form of QUESTION & ANSWER for each Chapter of Maths for Class 9. This study material help Class 9, Maths students in learning every aspect of Constructions. Students can understand Constructions concept easily and consolidate their learning by doing Online Practice Tests on Maths,Constructions chapter repeatedly till they excel in Class 9, Constructions. Free ONLINE PRACTICE TESTS on Class 9, Constructions comprise of Hundreds of Questions on Constructions, prepared by the highly professionals team. Every repeat test of Constructions will have new set of questions and help students to prepare themselves for exams by doing unlimited Online Test exercise on Constructions. Attempt ONLINE TEST on Class 9,Maths,Constructions in Academics section after completing this Constructions Question Answer Exercise.

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Constructions

The construction of a triangle ABC, given that BC=3 cm and angle C=60° is possible when difference of AB and AC equals to

a) 3.4 cm
b) 3.2 cm
c) 2.8 cm
d) 3 cm

✔Answer

Correct Answer Is : 2.8 cm

Solution Is :

The construction of a triangle ABC, given that BC=6 cm and angle C=45° is not possible when difference of AB and AC equals to

a) 6.9 cm
b) 6.5 cm
c) 7.2 cm
d) 4 cm

✔Answer

Correct Answer Is : 6.9 cm

Solution Is :

With a ruler and compass which of the following angles can be constructed?

a) 80°
b) 90°
c) 100°
d) 110°

✔Answer

Correct Answer Is : 90°

Solution Is :

14. For constructing angle of 90° at the initial point of a given ray, following steps of construction are followed (Refer figure below) 1. Draw a ray OA. 2. With O as centre and any radius draw an arc cutting OA at C. 3. With centre C and same radius as in step C, draw an arc cutting previous

a) Scalene triangle
b) Isoceles triangle
c) Equilateral triangle
d) None of the above

✔Answer

Correct Answer Is : Equilateral triangle

Solution Is :

14. For constructing angle of 90o at the initial point of a given ray, following steps of construction are followed (Refer figure below) 1. Draw a ray OA. 2. With O as centre and any radius draw an arc cutting OA at C. 3. With centre C and same radius as in step C, draw an arc cutting previous arc

a) Obtuse angle
b) Right angle
c) Acute angle
d) None of the above

✔Answer

Correct Answer Is : Right angle

Solution Is :

In figure below, angle ABC constructed is equal to

a) 47.5°
b) 110°
c) 52.5°
d) 60°

✔Answer

Correct Answer Is : 60°

Solution Is :

In figure below, angle DEF constructed is equal to

a) 120°
b) 140°
c) 57.5°
d) 65°

✔Answer

Correct Answer Is : 120°

Solution Is :

While constructing a triangle XYZ in which angle Y= 30° ,angle Z=90°, XY+YZ+ZX=11cm and P and Q are extended arms of Y and Z respectively, then

a) bisectors of XP and XQ intersect PQ at Y and Z respectively
b) perpendicular bisectors of XP and XQ intersect PQ at Y and Z respectively
c) At P, a ray PL is drawn such that angle LPQ=30o
d) None of the above

✔Answer

Correct Answer Is : perpendicular bisectors of XP and XQ intersect PQ at Y and Z respectively

Solution Is :

On constructing a right triangle ABC whose base is 12 cm and sum of hypotenuse and the other side is 18 cm, AB is extended till point D such that BD is equal to 18 cm, then

a) bisector of CD intersects BD at A
b) Angle ACB is obtuse
c) Perpendicular bisector of CD intersects BD at A
d) None of the above

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Class 9 Maths Study Material

Constructions

The construction of a triangle ABC, given that BC=3 cm and angle C=60° is possible when difference of AB and AC equals to

Correct Answer Is : 2.8 cm

Solution Is :

The construction of a triangle ABC, given that BC=6 cm and angle C=45° is not possible when difference of AB and AC equals to

Correct Answer Is : 6.9 cm

Solution Is :

With a ruler and compass which of the following angles can be constructed?

Correct Answer Is : 90°

Solution Is :

14. For constructing angle of 90° at the initial point of a given ray, following steps of construction are followed (Refer figure below) 1. Draw a ray OA. 2. With O as centre and any radius draw an arc cutting OA at C. 3. With centre C and same radius as in step C, draw an arc cutting previous

Correct Answer Is : Equilateral triangle

Solution Is :

14. For constructing angle of 90o at the initial point of a given ray, following steps of construction are followed (Refer figure below) 1. Draw a ray OA. 2. With O as centre and any radius draw an arc cutting OA at C. 3. With centre C and same radius as in step C, draw an arc cutting previous arc

Correct Answer Is : Right angle

Solution Is :

In figure below, angle ABC constructed is equal to

Correct Answer Is : 60°

Solution Is :

In figure below, angle DEF constructed is equal to

Correct Answer Is : 120°

Solution Is :

While constructing a triangle XYZ in which angle Y= 30° ,angle Z=90°, XY+YZ+ZX=11cm and P and Q are extended arms of Y and Z respectively, then

Correct Answer Is : perpendicular bisectors of XP and XQ intersect PQ at Y and Z respectively

Solution Is :

On constructing a right triangle ABC whose base is 12 cm and sum of hypotenuse and the other side is 18 cm, AB is extended till point D such that BD is equal to 18 cm, then

Correct Answer Is : Perpendicular bisector of CD intersects BD at A

Solution Is :

In the following right triangle PQR, angles PQR and PRQ are

Correct Answer Is : complementary

Solution Is :

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