UncategorizedClass 9 Maths Chapter 7 Triangles MCQs

Class 9 Maths Chapter 7 Triangles MCQs

You can find multiple-choice questions (MCQs) with answers for Class 9 Maths Chapter 7 Triangles online. These questions follow the current exam format. Practicing these MCQs can help students prepare well for their exams. All questions are based on the CBSE (2024-2024) and NCERT guidelines. Each question comes with a clear explanation to help students grasp the concepts better. Explore chapter-specific MCQs at Infinity Learn (IL) and also review important questions for Class 9 Maths.

MCQs on Class 9 Maths Chapter 7 Triangles

Q. Which of the following is not a type of triangle based on sides?
A) Equilateral
B) Isosceles
C) Scalene
D) Right
Solution: D) Right

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    Also Check: Chapter 1 Number System MCQs

    Q. In an equilateral triangle, each angle measures:
    A) 45°
    B) 60°
    C) 90°
    D) 180°
    Solution: B) 60°

    Q. The sum of all angles of a triangle is:
    A) 90°
    B) 180°
    C) 270°
    D) 360°
    Solution: B) 180°

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    Q. In an isosceles triangle, the angles opposite to equal sides are:
    A) Right angles
    B) Acute angles
    C) Obtuse angles
    D) Equal angles
    Solution: D) Equal angles

    Q. Which theorem states that the sum of all angles of a triangle is 180°?
    A) Pythagoras Theorem
    B) Angle Sum Property
    C) Isosceles Triangle Theorem
    D) Midpoint Theorem
    Solution: B) Angle Sum Property

    Q. The side opposite to the right angle in a right-angled triangle is called:
    A) Hypotenuse
    B) Adjacent side
    C) Opposite side
    D) Base
    Solution: A) Hypotenuse

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    Q. Which of the following cannot be the angles of a triangle?
    A) 30°, 60°, 90°
    B) 50°, 60°, 70°
    C) 40°, 50°, 100°
    D) 45°, 45°, 90°
    Solution: C) 40°, 50°, 100°

    Q. The point where all medians of a triangle meet is called:
    A) Orthocenter
    B) Centroid
    C) Incenter
    D) Circumcenter
    Solution: B) Centroid

    Q. The ratio of the areas of two similar triangles is equal to the ratio of the squares of their corresponding:
    A) Perimeters
    B) Altitudes
    C) Medians
    D) Angles
    Solution: B) Altitudes

    Q. The ratio of the corresponding sides of two similar triangles is known as:
    A) Congruence
    B) Proportionality
    C) Similarity
    D) Perpendicularity
    Solution: C) Similarity

    Q. In a right-angled triangle, the side opposite to the angle of 30° is:
    A) Hypotenuse
    B) Base
    C) Perpendicular
    D) None of these
    Solution: C) Perpendicular

    Also Check: Chapter 5 Introduction to Euclid’s Geometry MCQs

    Q. The angles of a triangle are in the ratio 2:3:5. The largest angle is:
    A) 30°
    B) 40°
    C) 50°
    D) 60°
    Solution: D) 60°

    Q. Which of the following pairs of triangles is always similar?
    A) Equilateral and Isosceles
    B) Scalene and Equilateral
    C) Equilateral and Scalene
    D) Isosceles and Scalene
    Solution: B) Scalene and Equilateral

    Q. The bisectors of the angles of a triangle intersect at a point called:
    A) Centroid
    B) Incenter
    C) Orthocenter
    D) Circumcenter
    Solution: B) Incenter

    Q. If the sides of a triangle are in the ratio 3:4:5, then the triangle is:
    A) Equilateral
    B) Isosceles
    C) Scalene
    D) Right-angled
    Solution: D) Right-angled

    Q. The perimeter of an equilateral triangle with each side measuring 6 cm is:
    A) 12 cm
    B) 18 cm
    C) 24 cm
    D) 36 cm
    Solution: B) 18 cm

    Q. Which theorem is used to prove that two triangles are similar?
    A) Pythagoras Theorem
    B) Thales Theorem
    C) AA Similarity Theorem
    D) SAS Similarity Theorem
    Solution: C) AA Similarity Theorem

    Q. The ratio of the corresponding altitudes of two similar triangles is equal to the ratio of their:
    A) Perimeters
    B) Areas
    C) Corresponding sides
    D) Angles
    Solution: C) Corresponding sides

    Q. In an isosceles triangle, the angle opposite to the base is called:
    A) Right angle
    B) Acute angle
    C) Obtuse angle
    D) Vertex angle
    Solution: D) Vertex angle

    Q. The line segment joining the midpoints of two sides of a triangle is called:
    A) Median
    B) Perpendicular bisector
    C) Altitude
    D) Angle bisector
    Solution: A) Median

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