Help Please Will Give Medal!

Which Venn diagram is NOT correct?

Question

Help Please Will Give Medal!


Which Venn diagram is NOT correct?

anonymous · Answer

Hold on im getting the graphs :)

anonymous · Answer

attachment

mathstudent55 · Answer

Do you understand what makes a Venn diagram correct or incorrect?

mathstudent55 · Answer

The outer circle contains the more general term.
The inner circle contains the more specific term.

mathstudent55 · Answer

I'll tell you right away the first diagram is correct.
I'll use it to explain it to you.

mathstudent55 · Answer

|dw:1399325594348:dw|

mathstudent55 · Answer

Once again, this Venn diagram is correct.

mathstudent55 · Answer

What this Venn diagram shows is that out of all parallelograms (contained in the larger circle) only some are also rhombuses (contained in the smaller circle).

mathstudent55 · Answer

You can think of it this way. 

Every rhombus is inside the rhombus circle and inside the parallelogram circle. That means every rhombus is also a parallelogram.
Every parallelogram is not necessarily a rhombus.

mathstudent55 · Answer

Now you need to go through each Venn diagram and ask yourself:
Is every [thing in inner circle} also a [thing in outer circle]?
If the answer is yes, the Venn diagram is true. If the answer is no, the Venn diagram is false.

mathstudent55 · Answer

Let's do the first one:

Is every [thing in inner circle} also a [thing in outer circle]?
First Venn diagram has rhombus & parallelogram.

Is every RHOMBUS also a PARALLELOGRAM?
Answer is yes, so the first Venn diagram is true.

anonymous · Answer

ok

mathstudent55 · Answer

Now you do the same to the other 3.
One question will have an answer of no.
That's the one that has a false Venn diagram.

anonymous · Answer

the 2 one is correct

anonymous · Answer

wait sorry not the second one

anonymous · Answer

the 3 and 4th one are correct

anonymous · Answer

@mathstudent55

mathstudent55 · Answer

B. Is every kite a quadrilateral? Yes. B is correct.

mathstudent55 · Answer

C. Is every square a rhombus? Yes. C is correct.

mathstudent55 · Answer

D. Is every rectangle a square?

|dw:1399327138499:dw|

anonymous · Answer

Haha no :P

mathstudent55 · Answer

That means this is the Venn diagram that is incorrect.
For it to be correct, it would have to be:

|dw:1399327248427:dw|

mathstudent55 · Answer

Since it's the opposite, it's incorrect.

anonymous · Answer

OK thank you! :)

anonymous · Answer

could you help me with something else?

mathstudent55 · Answer

No, sorry, gtg.
If I'm on some other time, I'll try to help.
Also if you tag me, I'll try to help and you can see my answer when you get back.

anonymous · Answer

ok thanks for the help anyway! :)

mathstudent55 · Answer

You're welcome.