## imqwerty one year ago save me answer this!!!

1. imqwerty

We have a quadrilateral ABCD with AB+CD+AC=20cm and the area of quadrilateral is 50cm^2. Find the length of diagonal BD.

2. imqwerty

3. imqwerty

@dan815

4. anonymous

i think problem is lacking information

5. imqwerty

no this is the whole problem.

6. imqwerty

what kind of information do we need other than provided nd how can we relate the information given above with that extra information that is needed.

7. anonymous

give some context about this problem, is it a school problem? maybe olimpics or something, idk. I think i need information about the quadrilateral, is it a trapezoid, or maybe a parallelogram. Does the problem comes with a graph?

8. imqwerty

no this information is nt given nd this is nt a school problem

9. anonymous

It's a university problem then

10. anonymous

course?

11. imqwerty

idk it ws given to me by my math professor at coaching

12. anonymous

All i can think of is Brahmagupta's formula $A=\sqrt{(s-a)(s-b)(s-c)(s-d)}$ where s=a+b+c+d, and a,b,c,d are the sides of the quadrilateral but i dont have any information about the quadrilateral being inscribed in a circle. So i'm sorry, i can't help you, keep bumping and maybe someone does it

13. imqwerty

thanks @RicardoDelfin