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CBSE Class 9 Mathematics: Important 3 Marks Questions for Annual Exam 2019

In this article you will get the CBSE Class 9 Mathematics: Important 3 Marks Questions. All the questions have been picked from the most important topics of class 9 Maths. Each question has been provided with an apt solution to help you make an easy and quick preparation.

Jan 25, 2019 11:41 IST
    CBSE Class 9 Mathematics Exam 2018
    CBSE Class 9 Mathematics Exam 2018

    As the exams for all school students are about to commence within a month or two, so this is the time when they must have an authentic and reliable study resource to make quick revision of the complete syllabus. Specially in Maths, practice is the only key to excel in this subject. Here, in this article, we are providing a set of the most important 3 marks questions with solutions to prepare for the CBSE class 9 Mathematics annual exam 2019. By practicing these important questions, students can get an idea of the important topics and also assess their preparedness for the final exam. This will help them to fine-tune their preparation. Moreover, the solutions provided here will give students an idea to write a proper solution to each question in the exam so as to score full marks.

    In CBSE Class 9 Mathematics Exam 2019, section - C will comprise 10 questions of 3 marks each.

    All the questions given here have been picked from the most important topics of class 9 Maths. All these questions have been provided with the etailed solutions to help students make an easy and quick preparation.

    Given below are some sample questions for CBSE Class 9 Mathematics: Important 3 Marks Questions:

    Q. In a figure ABC is an equilateral triangle. The coordinates of vertices B and C are (3,0) and (-3,0) respectively. Find the coordinates of its vertex A.

    Solution.

    Given coordinates of B and C are (-4, 0) and (4, 0)
    Draw AD perpendicular to BC
     and CO = OB = 4 units
    Hence O coincides with the origin.
    Since ABC is an equilateral triangle, AB = BC = CA = 8 units
    In right triangle AOC, AC2 = AO2 + OC2 [By Pythagoras theorem]

    ⟹ 82 = AO2 + 42

    ⟹ AO2 = 64 – 16 = 48

    ⟹ AO = √48 units

    Hence the coordinates of A are (0, √48).

    CBSE Class 9 Maths Chapter-wise Important Topics and Questions

    Q. Suman spins two spinners, one of which is labeled 1, 2 and 3 and the other are labeled A, B, C and D. Find the probability of:

    (i) Stopping at 2 and C.

    (ii) Stopping at 3 and either B or D

    (iii) Stopping at any number and A

    Solution.

    Sample space = {A1, A2, A3, B1, B2, B3, C1, C2, C3, D1, D2, D3}

    Total possible outcome = 12

    Probability of stopping at 2 and C = 1/12

    Probability of stopping at 3 and either B or D = 2/12 = 1/6

    Probability of stopping at any number and A = 3/12 = 1/4

    CBSE Class 9 Mathematics Practice Papers for Annual Exam 2019

    Q. Construct an angle of 135o at the initial point of a given ray and justify the construction.

    Solution.

    Steps of construction:   

    1.  Draw a ray OA. 

    2. With its initial point O as centre and any radius, draw an arc BE, cutting OA and its produced part at C and E respectively. 

    3. With centre B and same radius (as in step 2), draw  an arc, cutting  the arc BE at C. 

    4. With C as centre and the same radius, draw an arc cutting the arc BE at D. 

    5. With C and D as centres, and any convenient radius (more than 1/2 CD), draw two arcs intersecting at P.

    6. Join OP.

    Then ∠AOP = ∠EOP = 90o 

    7. Draw OQ as the bisector of ∠EOP.
    Then, ∠AOQ =135o

    Justification : 
    By construction ∠AOP = 90o 

    Thus, ∠AOP = ∠EOP = 90o  

    Also, OQ is drawn as the bisector of ∠EOP

    Therefore, ∠POQ =1/2∠EOP =1/2 × 90o = 45o

    Thus, ∠AOQ = ∠AOP + ∠POQ = 90o + 45o = 135o

    Hence justified.

    To get the complete set of questions, click on the following link:

    CBSE Class 9 Mathematics: Important 3 Marks Questions with Solutions

    CBSE Class 9 Mathematics Exam 2018: Important 1 Mark Questions

    CBSE Class 9 Mathematics Exam 2018: Important 2 Marks Questions

    Students may also check the following links to explore more stuff, important for CBSE Class 9 Annual exam preparations:

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