Question

See attachment

Answer 1

@AriPotta

Answer 2

I think its just 2 parts to 1 question

Answer 3

how are you supposed to find the height of the child. i'm so confused

Answer 4

uhm.... lets c

Answer 5

hmmmm

Answer 6

i think you need to get someone else to help you here. i'm sorry

Answer 7

Its quite okay, you've helped a lot.

Answer 8

and for that i thank u

Answer 9

break a leg, rachel

Answer 10

the triangles for tree and flag pole are simikar to each other thus there corresponding sides are proportional

Answer 11

ok, could u show that by setting a proportion uP?

Answer 12

84/119=height of pole / 51

Answer 13

tnx u. height being 'x?

Answer 14

yeah

Answer 15

thanks.

Answer 16

I'll set it up that way

Answer 17

also it is mention in the question that the height of shadow for child is 7 ... thus u can setup another triangle which is similar to emaining two

Answer 18

I got 36?

Answer 19

ok

Answer 20

So the height of the child is 36 ft?

Answer 21

height of flagpole is 36

Answer 22

oh.

Answer 23

Raja?

Answer 24

Could u explain it in words?

Answer 25

Thanks

Answer 26

I believe i will comprehend better that way

Answer 27

Hmm,

Answer 28

ok

Answer 29

let me look at ur attachment again

Answer 30

thanks.

Answer 31

luis

Answer 32

i got 36 as the height of the flag pole

Answer 33

so, what does the 36 have tho do with the childs height

Answer 34

and how'd u get 12

Answer 35

Id just like a clearer explanation

Answer 36

mk lets c

Answer 37

I am sorry, I don't get it.

Answer 38

Do you get it, raja?

Answer 39

do you understand how he got \[\frac{x}{51}=\frac{84}{119}\]?

Answer 40

no.

Answer 41

he did not really explain, so I therefore did not actually understand.

Answer 42

o yea

Answer 43

i think i do

Answer 44

ur trying to find the height of the flagpole there

Answer 45

which i think was 36?

Answer 46

the thing about similar triangles is that they are equivalent. I mean, you get one of them but zooming into the other triangle. In this case, you can imagine the triangle with the tree as a zoomed in version of the triangle with the pole.
So, the sides are proportionally larger than the sides of the smaller triangle.
So you're essentially asking "If 119ft was 84 ft before i zoomed in, what should 51 ft have been?"

Answer 47

hm...

Answer 48

so, 84/119=51/x?

Answer 49

it's the other way around. You see, x is smaller than 51. You know that.
So, on the left hand side, the bigger number goes on top.

Answer 50

Oh,okay.

Answer 51

But, is the height of the pole 36?

Answer 52

yes it is.

Answer 53

Okay.

Answer 54

Let me think

Answer 55

Sure. Take your time.

Answer 56

Thanks :D

Answer 57

Hmmmm..

Answer 58

Ok. so ur saying that it should 84/119 = x/51,yes?

Answer 59

exactly. You see how the smaller numbers are on top and the bigger ones are at the bottom?

Answer 60

Yes, sir. And I believe x is 36, according to the Calculator on Google.com.

Answer 61

haha good.

Answer 62

Great. But, the height of the child cannot be 36.

Answer 63

At least, I do not think so.

Answer 64

Now, I can see Luis_Rivera got 12 for some reason.

Answer 65

yeah. the triangle with the kid is to be taken separately.
You can compare that triangle with the one with the pole or the one with the tree.
If you compare it with the tree, you get
\[\frac{7}{119}=\frac{\text{height of the kid}}{51}\]
do you see how i got that?

Answer 66

hmmm.

Answer 67

What did we say the pole was? 36?

Answer 68

yup

Answer 69

okay. lets just do it with the tree.

Answer 70

o yea, 7/119 because they are both bases,yes?

Answer 71

and 51 and the height bcuz they are both tall sides.

Answer 72

yep

Answer 73

Oooooo! Ok, let me solve!

Answer 74

One moment plz!

Answer 75

7/84=height/51? could u do that with the pole?

Answer 76

51 is the height of the tree, not the pole.

Answer 77

o sorry. x/36

Answer 78

Yeah :)

Answer 79

great. i think I'm actually getting this! Can you believe it?

Answer 80

Anyhow, let me solve with the tree.

Answer 81

Haha great :D
Keep it up!

Answer 82

:D Thanks! Omg what if you had been offline?!

Answer 83

Okay. According to Google, 51*7/119 equals 3.

Answer 84

therefore making the child 3 feet tall?

Answer 85

Yyyyyup

Answer 86

Woah. I got the answer?!

Answer 87

yyyyup :)

Answer 88

One second though.

Answer 89

THERE we go!

Answer 90

Thanks!

Answer 91

lol thanks

Answer 92

YW!

Answer 93

and you're welcome.

Answer 94

:)

Answer 95

WAIT

Answer 96

Sorry, I forgot; it says to round to the nearest whole cm.