Question

Check for work/Assistance

Answer 1

The cross-section design of the kerbing for a driverless-bus roadway is shown opposite. The metal strip is inlaid into the concrete and is used to control the direction and speed of the bus. Find the width of the metal strip.

Answer 2

Not sure on how to solve this, would you need to use the Sine or Cosine Rule?

Answer 3

You need to find BC first

Answer 4

Wait hold on

Answer 5

Never mind heehe. I'm dumb so don't rely on me (: @Shadow

Answer 6

wait how did you find it was 20

Answer 7

Oh im dumb sorry

Answer 8

LUL

Answer 9

For the height I got 549.5

Answer 10

Nvm 187.93

Answer 11

Agh, im just stuck here

Answer 12

welp im trying dude >.>

Answer 13

Its okay x.x

Answer 14

welp i got some small number dats probableh wrong

Answer 15

what did you do to solve for it

Answer 16

pls tell meh dis is multiple choice cause dis would beh so much easier >.>

Answer 17

No, this is all short response x.x

Answer 18

well i got 84.97 its most likely wrong, i was following what mchen was saying...and applied some things...but im not confident in my answer...also i found your problem

http://prntscr.com/kyqoal

Answer 19

Okay, my teacher gave us the answer (number but not the work, I need to find the work)

What did you do, it is right http://prntscr.com/kyqom1

Answer 20

Oh wow o-o

Answer 21

Um well mah work is like super messy is that okie?

Answer 22

Its okay

Answer 23

Lets see I first filled in the gaps of the angles.

Based on your drawing you see that the strip and A they are parallel to each other. If you apply the right angled you would get a perpendicular intersection. Soo...



So I filled in the angles in that area...



Following so far?

Answer 24

Yes

Answer 25

Okie gud :3

I then decided to find the height (200 is the hypotenuse)...



You have your angle 20 and your hypotenuse 200. So you follow by cosine to find b.

\(\large\bf{cos(20)=\frac{b}{200} \approx 187.94}\)

Answer 26

Yes, I got there

Answer 27

Now you in order to find the width you need to sort of split the triangles length...



So we need to find z.

We need to fill in the missing angles on the length.

We then find z.

\(\large\bf{\tan(38)=\frac{187.94}{z} \approx 240.55

Answer 28

\(\large\bf{\tan (38)=\frac{187.94}{z} \approx 240.55}\)

Answer 29

Gah! Thats where I screwed

I was not sure how to find them e.e

Answer 30

ye you just had to find the angles. just identify the top angles then simplify to find the lower ones cx

Answer 31

I was blind there, anyway,, continue

Answer 32

So we find z already.



just posting this up so i can work wid it

Answer 33

Now we need to find y. So we sum up the angles that create y.



So your angles is 60. Now follow with tangent.

\(\large\bf{tan(60)=\frac{y}{187.94} \approx 325.52}\)

So now to find x you simply subtract y by z.

\(\large\bf{325.52-240.55 = 84.97}\)

Answer 34

my work btw

Answer 35

wow, thank you so much afvdssfb <3
A relief

Answer 36

no problem cx