class 9 th exercise 6.1 question number 5. Question class 9 th exercise 6.1 question number 5. in progress 0 Math Iris 2 weeks 2021-09-05T06:02:37+00:00 2021-09-05T06:02:37+00:00 1 Answer 0 views 0

## Answers ( )

Step-by-step explanation:Solution:

In the question, it is given that (OR ⊥ PQ) and POQ = 180°

So, POS+ROS+ROQ = 180°

Now, POS+ROS = 180°- 90° (Since POR = ROQ = 90°)

∴ POS + ROS = 90°

Now, QOS = ROQ+ROS

It is given that ROQ = 90°,

∴ QOS = 90° +ROS

Or, QOS – ROS = 90°

As POS + ROS = 90° and QOS – ROS = 90°, we get

POS + ROS = QOS – ROS

2 ROS + POS = QOS

Or, ROS = ½ (QOS – POS) (Hence proved).