Q1 of 23 Page 266

In the figure, if AB = CD and ∠AOB = 90° find ∠COD

We know “Angles subtended by equal chords at the center of acircle are equal”.


∠COD = ∠AOB = 900


More from this chapter

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1

Name the following parts from the adjacent figure where ‘O’ is the centre of the circle.

i.


ii.


iii. BC


iv.


v. DCB


vi. ACB


vii.


viii. shaded region


2

State true or false.

i. A circle divides the plane on which it lies into three parts. ( )


ii. The area enclosed by a chord and the minor arc is minor segment. ( )


iii. The area enclosed by a chord and the major arc is major segment. ( )


iv. A diameter divides the circle into two unequal parts. ( )


v. A sector is the area enclosed by two radii and a chord ( )


vi. The longest of all chords of a circle is called a diameter. ( )


vii. The mid point of any diameter of a circle is the centre. ( )

 2

In the figure, PQ = RS and ∠ORS = 48°. Find ∠OPQ and ∠ROS.

 3

In the figure PR and QS are two diameters. Is PQ = RS?