Circles. Mathematics CBSE, Class 9: lessons, tests, tasks.

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1.	Introduction to circle
2.	Circle through three points
3.	Theorems on angle subtended by the chord at the centre
4.	Theorems on perpendicular from the centre to a chord
5.	Theorems on equal chords
6.	Theorems on angle at the centre and the circumference
7.	Theorems on angles at the circumference on the same segment
8.	Special cases of angle at the centre and the circumference
9.	Theorem on interior angles of a cyclic quadrilaterals

1.	Knowing the parts Difficulty: easy	3
2.	Choose the correct answer Difficulty: easy	2
3.	Find the angle Difficulty: easy	1
4.	Find the measure of 'b' Difficulty: easy	1
5.	Find the required angle Difficulty: medium	3
6.	Find the degree measure of 'x' Difficulty: medium	2
7.	Find the subtended angle Difficulty: medium	2
8.	Find the distance Difficulty: medium	1
9.	Find the area of the shaded region Difficulty: medium	4
10.	Find the angle from the figure Difficulty: medium	1
11.	Find the unknown angle 'y' Difficulty: medium	2
12.	Find the distance between the chords Difficulty: hard	2
13.	Find the chord length Difficulty: hard	4
14.	Prove the problem Difficulty: hard	4
15.	Explore the unknown angles Difficulty: hard	4

1.

Training test

Difficulty: medium

10

1.

Methodical recommendation

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