Can u please help me with #38 I HAVE TRIED SO HARD ON IT and still cant get the answer please help:)?
http://cbuddman.files.wordpress.com/2009/08/final-review-part-2.pdf

- anonymous

- chestercat

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- Kuoministers

first you would need to find the area of the rectangle. Then you would find the area of the triangle with the formula A = 1/2 B H.
To find the height you would need to sin rule.

- anonymous

help please:)

- Kuoministers

have you learnt of special triangles?

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- anonymous

30 60 90...45 45 90..i learned them

- Kuoministers

if you used the sin rule the length opposite 60 is \[\sqrt{48}\]

- Kuoministers

they want the area of this question right?

- anonymous

yes

- Kuoministers

if you used the sin rule again you would find the bottom length to be equal to 4.

- Kuoministers

so the area of the triangle is equal to 8 root 3. \[8\sqrt{3}\]

- anonymous

HOW U GET THAT?

- Kuoministers

ok.. the area of the traingle is 1/2 b h right?
1/2 * 4 * \[\sqrt{48}\]
I have gotten this by using right angle trig? sin cos tan?

- Kuoministers

1/2 * 4 * \[\sqrt{48}\] = \[\sqrt{192}\]
which is simplified to be\[8\sqrt{3}\]

- anonymous

so now i know that whats next?

- Kuoministers

well i got the area of the triangle so all you need now is area of rectangle and add them together

- Kuoministers

and sorry this has nothing to do with special triangles

- Kuoministers

ill complete it for you... (hope you can understand this)
the bottom of the rectangle is equal to 6 ( 10-4)
the length is \[\sqrt{48}\]
so its \[\sqrt{48}\] * 6
which is \[24\sqrt{3}\]
so now we add these area together which is \[32\sqrt{3}\]

- Kuoministers

do you understand it if you dont ill explain it again :)

- anonymous

i thought the bottom rectangle was 4?

- Kuoministers

It says on the diagram the whole length which is the triangle and rectangle is equal to 10. The bottom of the triangle is 4. So the rectangle is 10-4. which is 6

- anonymous

oh okay! THANK U SO MUCH!:)

- Kuoministers

:)

- Kuoministers

if you dont mind giving me a medal :) please do

- anonymous

HOW CAN I DO THAT?

- Kuoministers

click best response lol

- Kuoministers

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- anonymous

OH lol ok i will wait hold up wat do i add to get 32√3 lol

- Kuoministers

well the area of the triangle and area of rectangle
which is 24 root 3 + 8 root 3

- anonymous

okay thank u!! so much:)

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