At Hudson Middle School, there are 2 bells that ring frequently. One bell rings every 10 seconds and the other one rings every 33 seconds.
At 10:00 a.m., both bells ring simultaneously. How many seconds will it
take for the bells to ring at the same time again?

i) BC ║ AD

iii) BA ≅ CD

v) ∠CBA ≅ ∠BCD

Step-by-step explanation:

In a isosceles trapezoid. The non parallel sides must be equal.

In general, trapezoid has one set of parallel lines in addition isosceles trapezoid the non parallel sides must be equal.

Therefore, the angles ∠CBA ≅ ∠BCD

Hence, the following statements are true.

i) BC ║ AD

iii) BA ≅ CD

v) ∠CBA ≅ ∠BCD

Hope this will helpful.

Thank you.