Let's see
In ∆ABE and ∆CBE
- BE=BE(Common side)
- AE=EC[Diagonals of a parallelogram bisect each other]
- <AEB=<BEC[90°]
So by
SAS congruence the triangles are congruent
AB=BC
Fact:-
It's already given AC is perpendicular to BD
- It means diagonals are perpendicular to each other
According to general property of rhombus this parallelogram is also a rhombus.
So sides are equal hence AB =BC
.57 I would assume but it really depends on how your scaling it
91$ per day you divid 455$ by the 5 days and get 91$
$.75 bc 15 x 4 is 75 so that would make 75¢ or $.75