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Mathematics 19 Online
OpenStudy (anonymous):

Help please.

OpenStudy (anonymous):

OpenStudy (anonymous):

statement 6?

OpenStudy (mertsj):

What is the area of the 4 grey triangles in figure A?

OpenStudy (mertsj):

Hello???? Are you there???

OpenStudy (anonymous):

Yes sorry

OpenStudy (anonymous):

uh B-4xy

OpenStudy (mertsj):

Did you read the problem? It tells you what the area of the 4 grey triangles is in figure A

OpenStudy (mertsj):

What does statement 1 say?

OpenStudy (anonymous):

A-(1/2xy)-2xy

OpenStudy (mertsj):

Statement 1 says that the area of the 4 grey triangles inside Figure A = 4(1/2xy)=2xy

OpenStudy (mertsj):

Looking at the picture, we see that is true. The base and height of the grey triangles is x and y. So the area is 1/2(xy). There are 4 grey triangles so the total area of all 4 is 4 (1/2)(2xy) which is 2xy.

OpenStudy (mertsj):

Are you with me so far?

OpenStudy (anonymous):

yes

OpenStudy (mertsj):

So now, just to make sure, what is the total area of the 4 grey triangles?

OpenStudy (anonymous):

c2

OpenStudy (mertsj):

There are 4 grey triangles so the total area of all 4 is 4 (1/2)(2xy) which is 2xy.

OpenStudy (anonymous):

2xy my bad

OpenStudy (mertsj):

Are the grey triangles in Figure B the same as the grey triangles in Figure A?

OpenStudy (anonymous):

no

OpenStudy (mertsj):

What does it say ABOVE Figures A and B?

OpenStudy (anonymous):

oh yes they are

OpenStudy (anonymous):

they are identical but are arranged differently

OpenStudy (mertsj):

Yes. They are the same triangles and their area is, once again _____?

OpenStudy (anonymous):

2xy

OpenStudy (mertsj):

Now what does statement 4 say?

OpenStudy (anonymous):

Area of the four grey triangles inside figure B = 4xy

OpenStudy (mertsj):

Is that true?

OpenStudy (anonymous):

no

OpenStudy (mertsj):

Because we know that the area of the 4 grey triangles is 2xy. So statement 4 is obviously false.

OpenStudy (anonymous):

Wow such a simple question, im so dumb ;/

OpenStudy (anonymous):

Thanks for you help

OpenStudy (mertsj):

You are not dumb. I think you just need to read a little more carefully.

OpenStudy (mertsj):

yw and good luck

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