Practice CIRCLES - 9 | 9. Circles | CBSE 9 Mathematics | Allrounder.ai
K12 Students

Academics

AI-Powered learning for Grades 8–12, aligned with major Indian and international curricula.

Professionals

Professional Courses

Industry-relevant training in Business, Technology, and Design to help professionals and graduates upskill for real-world careers.

Games

Interactive Games

Fun, engaging games to boost memory, math fluency, typing speed, and English skills—perfect for learners of all ages.

Practice Questions

Test your understanding with targeted questions related to the topic.

Question 1

Easy

What is the definition of a chord?

💡 Hint: Think about the line connecting two points on the circumference.

Question 2

Easy

State Theorem 9.1.

💡 Hint: Consider equal lengths of line segments.

Practice 4 more questions and get performance evaluation

Interactive Quizzes

Engage in quick quizzes to reinforce what you've learned and check your comprehension.

Question 1

What does Theorem 9.1 state?

  • Equal chords subtend equal angles at the center
  • All chords are equal
  • Equal angles subtend equal chords

💡 Hint: Review the section discussing equal chords.

Question 2

True or False: The angle subtended by a chord at the center is always larger than 90 degrees.

  • True
  • False

💡 Hint: Consider the position of the chords in a circle.

Solve and get performance evaluation

Challenge Problems

Push your limits with challenges.

Question 1

Prove that if two arcs of a circle are congruent, then their corresponding chords are equal.

💡 Hint: Think about how arcs relate to the chords they subtend.

Question 2

A cyclic quadrilateral has angles A, B, C, and D such that A + C = 180°. Prove that it is cyclic.

💡 Hint: Relate properties of angles and the definition of cyclic quadrilaterals.

Challenge and get performance evaluation