#Finding Side Length

30 messages · Page 1 of 1 (latest)

lapis vapor
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I just need to find z based on all these other lengths. Note that the side lengths for the two triangles are in proportion because they are similar :)

tribal fable
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Ex: Angle FEC
The side opposite that angle is 36, and the other sides are 48 and 60
36^2 = 48^2 + 60^2 - 2•48•60•cos(x)
Solve x to get FEC

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Find BFC (hint: vertical angles)

lapis vapor
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so how would i use vert angles

tribal fable
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Find it via law of cosine

lapis vapor
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idk that

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lol

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sorry can you help me

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i am very lost

tribal fable
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The intersection of two straight lines create 4 angles

lapis vapor
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yeah

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i get that

tribal fable
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The Oppisite/vertical angles are the same

lapis vapor
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and they are all verticle angles

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yes

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agreed

tribal fable
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Lemme find a image from google

lapis vapor
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ok

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thanks

tribal fable
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Find DFE using law cosines then BFC

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From there, say BFC = y
X^2 = 64^2 + 36^2 - 2•64•36•cos(y)

lapis vapor
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I really do not know law of cosines

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sorry

tribal fable
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I cant give a direct answer as you wont learn anything

lapis vapor