NCERT Class 9 Solutions: Circles (Chapter 10) Exercise 10.5 – Part 2
Q-3 In the figure , where A, B and C are points on a circle with centre O. Find
The major arc AC subtends an angle AOC at the center and an angle ABC on rest of the circle. Therefore,
(the angle inside the quadrilateral ABCO).
In , (radius of the circle), therefore the triangle is isosceles and hence,
Q-4 In the figure, , ∠ , find
Note that, (Angles subtended by the same segment on the circle)
Q-5 In the figure, P, Q, R and S are four points on a circle. PQ and SR intersect at a point E such that ∠SEQ = 130° and ∠EQR = 20°. Find ∠ SPQ.
P, Q, R, S are four points on a circle.
PQ and SR intersect at a point E
(Angles in the segment of the circle)
So, ) (Angles subtended by the same arc)