Question

http://prntscr.com/hhtyci What is the length of side BC of the triangle?

Answer 1

@YoursTruly

Answer 2

I'm no good at math. Sorry.

Answer 3

I'm no good at math. Sorry.

Answer 4

Its okay, do you know anyone who is?

Answer 5

At least the Mods or someone?

Answer 6

Ummm.
@Arcadiouse

Answer 7

@Zepdrix

Answer 8

Okie, thanks

Answer 9

@Arcadiouse

Answer 10

@Zepdrix

Answer 11

I think zep will be on shortly.

Answer 12

Okie, thanks :)

Answer 13

No problem ^_^

Answer 14

In an isosceles triangles, the sides opposite the two equivalent angles are equal.

Answer 15

For the triangle that was provided,
our blue and red sides will be equivalent.

Answer 16

x+8 = 2x-1

Do you understand how to solve for x?
That will get us halfway through the problem.

Answer 17

Yes, so far

Answer 18

They all equal 60, right?

Answer 19

No, that's for an `equilateral` triangle :)
All three angles would be the same.

This triangle is `isosceles`, which told us that two of the angles were the same.
Which further tells us that two of the side lengths are the same.

The side length \(\rm x+8\) is the same as the side length \(\rm 2x-1\).
That's what allows us to equate them together like this,

\(\large\rm x+8=2x-1\)

Answer 20

Applying a few algebra steps tells us that this previously unknown value x is 9.

Since our third side (BC) relates to x, we can plug the value 9 in for x.

\(\large\rm 3\color{orangered}{x}-3\quad=\quad 3\color{orangered}{\cdot9}-3\)

Answer 21

Wow, I'm so glad I asked for help. I totally got that. I guess these aren't that bad

Answer 22

Ya, just a little weird at first I guess :D

Answer 23

#IhateMath

Answer 24

XD

Answer 25

Pshhh you just jelly that math got style ;3

Answer 26

I don't know that means ;3 we'll pretend it made sense tho

Answer 27

XD