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CBSE Class 9 Answered

In a parallelogram PQRS, the bisectors of adjacent angles R and S intersect each other at the point O. Prove that ROS = 90o.
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
answered-by-expert Expert Answer

Proof : PQRS is ||gm

R + S = 180o (co-interior angels)

1 + 2 = 90o

In ROS

1 + 2 + ROS = 180o

900 + ROS = 180o

ROS= 90o

Answered by | 04 Jun, 2014, 03:23: PM

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