CBSE|Arcs and Angles Subtended by them#!#RD Sharma Discussion

Theorem:-6Any angle subtended by minor arc in the alternate segment is acute and any angle subtended by major arc in the alternate segment is obtuse.

Any angle subtended by a minor arc in the alternate segment is acute and any angle subtended by a major arc in the alternate segment is obtuse.

The angle subtended by a minor arc in its alternate segment is…………….

Angle subtend by an arc at center is double the angle subtend b it at any point on remaining part OF circle||Angle is a semi circle is a 90 ||Example ||Congurent arc|| Equal arc||Cyclic quadrilateral

Assertion :- For a very small angle theta , sinthetaapproxtheta . Reason :- At very small angle, arc, subtends a right angle at the centre of arc.

Since the angles at the centre of a circle are proportional to the arcs subtending them (/_AOP)/(/_AOB)=(arc AP)/(arc APB)