Quickie on Simple problem, I'm confused ><

[WTF?]

The area of square WXYZ is 25 cm^2. The four smaller squares have sides 1 cm long. In triangle ABC, AB=AC. When triangle ABC is folded over line BC, point A coincides with O, the center of square WXYZ. What is the area of triangle ABC.


I got \(\displaystyle 3.5^2\)

is this right or wrong, plus can someone help me clarify it a bit?[/i]

 

[Unco]

G'day.

You'll have to show how you got that.

If you can edit the image with all the side lengths you have determined, that may be helpful.

 

[WTF?]

I think the scale's off.

I believe the 4 squares are above B and W and below C and Z respectfully.

plus I don't see how there are 4 squares with an area of 1.

 

[Unco]

I assumed the scaling issue was just Paint-awkwardness. As you say, I think we're supposed to assume the lengths are

The side lengths of the big square are 5 because its area is 25.

Also note the dashed red line is supposed to be equal in length to the blue dashed line (!).

Can you continue?

 

[Denis]

As Unco asked, HOW did you ever get (3.5)^2 ?
You can tell the base BC = 3, right?
And the height from A to BC is ...... ??

What is the formula for the area of a triangle?

 

[WTF?]

OH, I see. :x

It's \(\displaystyle 1.5^2\)

innit?

 

[Denis]

OH, I see. :x
It's \(\displaystyle 1.5^2\)
innit?

NO! 1.5 is half the base; again: WHAT IS THE FORMULA FOR AREA OF TRIANGLE?!
Move your royal siton and find it

 

[WTF?]

\(\displaystyle .75^2\) is teh answer.

 

[Denis]

WTF, you're either joking or ready for employment in Wendy's kitchen :evil:

 

[happy]

What does "WTF" stand for, anyway?

 

[Lizzie]

WTF= What The Flip *ehm, you know what I mean!

 

[happy]

:shock: That name is offensive, and this person has some nerve to pick it.

 

[Denis]

WTF? = What's The Formula ? Nothing wrong with that

 

[Lizzie]

haha, I hadn't thought of that one, lol. Good one, Denis. (lol, I keep wanting to spell it Dennis...)

 

[stapel]

WTF? = What's The Formula?

And here I thought it was "What's the frequency [Kenneth]?" :lol:

...now let's wait and see who's old enough to know what that refers to.... :wink:

Eliz.

 

[Unco]

Same here, listening to it right now.

 

[Lizzie]

I'm afraid that I don't fit into that category.

 

[WTF?]

WTF?= What's teh Formula :lol:

So am I stupid or something?! I can't seem to grasp at this problem, it's too subtle. :x

 

[Unco]

Answer me these question three:

[1.] You can tell the base BC = 3, right?
And the height from A to BC is ...... ??

[2.] What is the formula for the area of a triangle?

3. What is the answer?

 

[WTF?]

I think I lost my mind. :?