Question

i keep trying to do this question but i can't get it right...

Answer 1

Can you show us the question and your work to see where you are stuck at? That way we can guide you from where you're stuck :)

Answer 2

and the question is?

Answer 3

Lol. I'm leaving. I can't handle this.

Answer 4

i just posted the pic

Answer 5

Yeah, but the picture doesn't tell us what to do, nor where you are getting stuck.

Looking at the triangle and the answer choices, I take it the problem is to find the perimeter?

Answer 6

And a very nice picture it is.

Where should we hang it?

Answer 7

im sorry lol...im supposed to find the perimeter

Answer 8

And what results have you gotten when you've tried? It's possible you've gotten the right answer and just didn't recognize it!

Answer 9

i got 105. CD is 25,DE is 40 and EC is 40.

Answer 10

Oh, I guess I was a bit too optimistic :-)

How are you finding CD? I think I know what you did wrong...

Answer 11

You miscounted when you did CE, btw — the side of the triangle is 3, not 2, unlike when you do DE. The other problem is that you forgot to take the square roots...so you are adding c^2 instead of c

Answer 12

i used the distance formula

Answer 13

when do i do square roots?

Answer 14

Okay, you didn't read the coordinates of all of your points quite correctly, then.

Distance formula: \[d = \sqrt{(x_2-x_1)^2+(y_2-y_1)^2}\]

Answer 15

So to find the length of CD from (-3,1) to (1,4)
\[CD = \sqrt{(-3-1)^2+(1-4)^2} = \sqrt{(-4)^2+(-3)^2} = \sqrt{16+9} = \sqrt{25} = 5\]

Answer 16

Now do the other two and tell me what you get.

Answer 17

Note that DE and CE are NOT the same length...

Answer 18

5+6.3+6.7=18

Answer 19

thank you!!

Answer 20

Very good!