Start learning →

CBSE Class 9 Triangles, Circles and Geometry — practice questions — page 2

Explore 50 free Triangles, Circles and Geometry questions in CBSE Class 9 Mathematics. Open each question or exercise to read its content, reference answers and available explanation.

Practise Triangles, Circles and Geometry with Quill →

Triangles, Circles and Geometry questions and exercises with answers

Showing questions 31–50 of 50.

If the radius of a circle is doubled, its area becomes:Read the answer and worked solution →Area of a circle with radius 7 cm? (Use π = 22/7)Read the answer and worked solution →Circumference of a circle with diameter 14 cm (π = 22/7):Read the answer and worked solution →Volume of a cube with side 5 cm:Read the answer and worked solution →Pythagoras: hypotenuse of a right triangle with legs 6 and 8.Read the answer and worked solution →Sum of angles of a triangle:Read the answer and worked solution →Area of an equilateral triangle with side 4 cm:Read the answer and worked solution →Two figures are said to be similar if they haveRead the answer and worked solution →All circles areRead the answer and worked solution →All squares with different side lengths areRead the answer and worked solution →The criterion that uses two pairs of equal angles to prove triangle similarity is calledRead the answer and worked solution →In two similar triangles, the ratio of corresponding sides is calledRead the answer and worked solution →Pythagoras theorem applies to which triangles?Read the answer and worked solution →In triangle ABC, DE is parallel to BC where D lies on AB and E on AC. If AD = 2 cm, DB = 3 cm and AE = 4 cm, then EC equalsRead the answer and worked solution →Two triangles have areas in the ratio 49 : 64. The ratio of their corresponding sides isRead the answer and worked solution →A vertical pole 6 m tall casts a shadow 4 m long at the same time a tower casts a shadow 28 m long. The height of the tower isRead the answer and worked solution →In a right triangle the legs measure 9 cm and 12 cm. The hypotenuse isRead the answer and worked solution →If two triangles are similar and the ratio of their perimeters is 3 : 5, then the ratio of their areas isRead the answer and worked solution →In triangle ABC, AD bisects angle A and meets BC at D. If AB = 6 cm, AC = 9 cm and BC = 10 cm, then BD equalsRead the answer and worked solution →The hypotenuse of a right triangle is 26 cm and one leg is 24 cm. The other leg isRead the answer and worked solution →

Worked practice questions

If the radius of a circle is doubled, its area becomes:

  1. double
  2. triple
  3. 4 times
  4. 8 times
Show answer and solution

Correct answer: C. 4 times

1. Area of circle = πr². 2. If r becomes 2r, new area = π(2r)² = 4πr². 3. Therefore 4 times the original area. _Source: KMAT Karnataka 2022 PYQ Q.73_

Open this question →

Area of a circle with radius 7 cm? (Use π = 22/7)

  1. 22 cm²
  2. 144 cm²
  3. 49 cm²
  4. 154 cm²
Show answer and solution

Correct answer: D. 154 cm²

1. Area = πr² = (22/7) · 49. 2. = 22 · 7 = 154. _Source: TSICET 2024 PYQ Q.107 (Shift 1, Geometry)_

Open this question →

Circumference of a circle with diameter 14 cm (π = 22/7):

  1. 28 cm
  2. 44 cm
  3. 88 cm
  4. 21 cm
Show answer and solution

Correct answer: B. 44 cm

1. Circumference = π·d = 22/7 · 14. 2. = 22 · 2 = 44. _Source: TSICET 2024 PYQ Q.108 (Shift 1, Geometry)_

Open this question →

How to practise

  1. Choose a Triangles, Circles and Geometry question and try to work out your answer.
  2. Open the question to check the correct answer and read its worked solution.
  3. Continue in the app for bite-sized lessons, explanations and review with Quill. You can start without creating an account.

Put it into practice

Continue with Triangles, Circles and Geometry practice for CBSE Class 9. Read explanations as you go. No signup form needed to start.

Practise Triangles, Circles and Geometry →

More Mathematics topics

Mensuration: Perimeter and AreaSequences and ProgressionsCoordinate GeometryNumber SystemsPolynomials and Algebraic IdentitiesStatistics and Probability