Question

I have this trig. illustration but I dont know how to solve and what formula

Answer 1

Trig is awesome! Whatcha got?

Answer 2

I don't know what formula what to use and how to solve :(

Answer 3

Ok, let's start with this... do you know what supplementary angles are?

Answer 4

Yes, they add up to 180 deg right??
I know they must be equal to 180 deg but two given are exterior angle and one is interior

Answer 5

so youre saying that (4x-3=180)?

Answer 6

Is this an equilateral triangle, first off

Answer 7

I dont think so

Answer 8

Ok, I'm working something now...give me a sec

Answer 9

Okay thank you very much!

Answer 10

Ok here's what I came up with. Angle A is supplemental with 4x - 3 (that's what I am naming it, at least); angle B is supplemental with 9x + 12; and the other angle is 6x + 3. In order to find out what angle A is we need to subtract 4x - 3 from 180. When you do that you get that angle A is 183 - 4x. Angle B, subtracted from 180 is 168 - 9x. So in order to find out what x is, you have to add all the angles together and set them equal to 180, which is the measure of all the angles of the triangles, right?

Answer 11

That gives you an equation of
183 - 4x + 168 - 9x + 6x + 3 = 180. Combining like terms you can solve for x.
183 + 168 + 3 = 354. But you have to move it over to the other side of the equal sign and 180 - 354 = -174. But it's ok that it is negative, because when you combine your x's you get -7x. -7x = -174. x = 24.8 or if you round up, 25.

Answer 12

Ohhh I see! So we need to change x into 25 to get their angles

Answer 13

YES!!!! You go!

Answer 14

6x+3=153???

Answer 15

6(25)+3=153?

Answer 16

Oops, except its not coming out right. Let me look at it some more.

Answer 17

I think figured out my error...give me one more sec...I didn't go anywhere.

Answer 18

OMG I am totally stumped on this one. I keep getting x = -3 now, and that's not possible. I am going to keep working on it. I'll let you know if I come up with anything lucrative.

Answer 19

I keep getting negative angles all over the place with this one; don't know what to tell you except that angles cannot have negative measures.

Answer 20

Is the 6x + 3 the measure of an angle or the length of a side?

Answer 21

Sorry for afk. They're all angles

Answer 22

We can imagine a parallel line above and then relate the angles and using algebra and that the angles sum on each corresponding line is equal to 180 we can hopefully solve for X