Question

Please Help Me With This Question​

Answer 1

In given trapezium ABCD we have,

In ∆AOB and ∆COD

angle AOB = angle COD

( vertically opposite angles are equal)

angle OAB = angle OCD

( interior alternate angles are equal)

OB = OD

( sides opposite to equal angles of triangle are equal in measure )

thus, ∆AOB ~∆COD

( by SAS congruence rule )