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Mathematics 21 Online
Rainluke01:

i need help please

Rainluke01:

Rainluke01:

@ThisGirlPretty

ThisGirlPretty:

@Mehek is good :D

Rainluke01:

ok thanks

ThisGirlPretty:

No problems :D I think she'll be on your post in one minute. Just in case....

Rainluke01:

ok

Mehek:

@Vocaloid

Vocaloid:

|dw:1508360207969:dw|

Vocaloid:

|dw:1508360246920:dw|

Vocaloid:

using the fact that all angles in a triangle sum to 180, we can figure out the top two angles [let me know if you want me to work this out]

Vocaloid:

|dw:1508360290557:dw|

Vocaloid:

now, if you look at the whole entire triangle, it's also a 30-60-90 triangle

Vocaloid:

[sorry about the notifications guys, there's no way to unsubscribe yourselves yet]

Vocaloid:

anyway, the side across the 30degree side is 4 which means the side across the 60degree side is 4*sqrt(3)

Vocaloid:

|dw:1508360396910:dw|

Vocaloid:

now you can use the left triangle to find the vertical line in the middle (the side opposite the 30 degree angle) using the same 30-60-90 ratio

Vocaloid:

let me know if you get stuck

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