Question

surveyor took the following measurements from two irregular shaped pieces of land. some of the lengths angles measurements are missing. round to the nearest minute.

a) find the length of a.

b) find the measurement of angle H. write answer as, for example, 68 (degrees), 9

Answer 1

cannot open

Answer 2

do u get it @Loser66

Answer 3

i think that is 50 because 80-30 is 50 right @Loser66

Answer 4

yea im learning about that but i don't completely understand it @agent0smith

Answer 5

@charlotte123

Answer 6

Oh dear - I did not study this concept yet >.>

Answer 7

@trillestmali Looks like @agent0smith Is getting to It! I am of no help on the Subject >.>

Answer 8

can we use the pathyon theory to solve for a? @agent0smith

Answer 9

okay thanks doe @charlotte123

Answer 10

but isn't the triangle in the right upper corner a right triangle??

Answer 11

@trillestmali No need to thank me LOL
Good Luck and thank you for understanding :)

Answer 12

can we use sochatoa??

Answer 13

If you want to avoid the 25 degree & 45 minutes angle on the right corner avoid the right triangle altogether and answer both parts using the middle triangle.
Answer part b) first as angle H = angle DGH (alternate interior angles).

Then apply law of sines in the middle triangle to solve for a.

Answer 14

**25 degree & 54 minutes**

Answer 15

okay

Answer 16

The arrows might help to see where the stuff in the law of sinces comes from \[\Large \frac{ \sin G }{ 80 }= \frac{ \sin 49 }{ 62 }\]

Answer 17

should i cross multiple for this

Answer 18

You can, but you should learn faster ways to solve problems. Just multiply both sides by 80.

Answer 19

i got sin(G)(62)=60.38

Answer 20

Cross-multiplying isn't necessary. Skip a step and just multiply both sides by 80

Answer 21

\[\Large 80*\frac{ \sin G }{ 80 }= \frac{ \sin 49 }{ 62 }*80\]
what happens to the 80/80 on the left?

Answer 22

they cancel

Answer 23

Exactly. Learn from this... there's very rarely a need to cross multiply.

Answer 24

Equations are often solved faster w/o it

Answer 25

so in the right side u get .012??

Answer 26

No, check you're in degrees.

Answer 27

-.015?

Answer 28

No...

Answer 29

no i got 56.85 is that right

Answer 30

now*

Answer 31

Show me what you're doing. I have no idea.

Answer 32

\[\sin 49*80 the 62 *80 then divide then \]

Answer 33

I can't follow that. Write it in normal words, like (sin49/62)*80 or something.

Answer 34

Make sure you know what you are doing... the stuff on the right.\[\Large \sin G = \frac{ \sin 49 }{ 62 }*80\]

Answer 35

sine(49)(80)/(62)(80)

Answer 36

See above.

Answer 37

i multiple 80 top and bottom

Answer 38

Why??

Answer 39

i though what ever u do in the top u have to to it in the bottom

Answer 40

Take a careful look at this. \[\Large \frac{ \sin 49 }{ 62 }*80\]Do *exactly* what is shown.

Answer 41

That's when you're modifying a fraction, we are not doing that

Answer 42

okay i don't know what im missing here im back to my old answer -1.23

Answer 43

what did u get?

Answer 44

It doesn't matter what I get, if you can't find it yourself.

Do this, and exactly this, on your calculator. Make sure you have your calculator in degrees.

80*(sin49)/62

Answer 45

.97

Answer 46

Good.

Answer 47

finally ahah

Answer 48

\[\Large \sin G = 0.97\]now find G.

Answer 49

.02

Answer 50

How did you get that? did you find sin^-1(0.97)???

Answer 51

no i did sin(.97)=.02

Answer 52

sinG=0.97 you have to take the inverse sin of 0.97 to find G.

Answer 53

so it's 75.9

Answer 54

Yes.

Answer 55

so now we can do 180-49-75.9 to get angle h

Answer 56

Yep then we gotta find a \[\Large \frac{ a }{ \sin 55.1 }=\frac{ 62 }{ \sin 49 }\]