True and False
If 
and 
are adjacent sides of a rhombus, then 
.
False
Explanation:
Given that, 
⇒ 
are perpendicular to each other.
But, adjacent sides of rhombus are not perpendicular.
45
True and False
If and are adjacent sides of a rhombus, then .
False
Explanation:
Given that, ⇒ are perpendicular to each other.
But, adjacent sides of rhombus are not perpendicular.