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Question

In the figure, PQ = RS and ORS=48o. Find OPQ and ROS.
570066_0d1fbaf87bbf43dab8d0b7ffe6c264a0.png

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Solution

In given figure , PQ=RS and ORS=48.

In given figure O is the center of circle and point P,Q,R and S on the circumference of circle
Then line OP, OQ ,OR and OS are the radius of circle
So OP=OQ=OR=OS
In ΔOPQ and ΔORS
PQ=RS (Given )
OP=OR (Radius of circle)
OQ=OS (Radius of circle)
ΔPOQΔORS by SSS congruency
ORS=OPQ=48
OR=OS (radius)
OSR=ORS=48
In ΔORS
ROS+ORS+OSR=180
ROS+48+48=180
ROS=1804848=84
OPQ=48,ROS=84

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