#Finding Side Length
30 messages · Page 1 of 1 (latest)
I would use law of cosines
Say you have a triangle with 3 sides (A,B,and C) then the following statement is true
C^2 = A^2 + B^2 - 2ABcos(c), where c is the angle opposite of side C
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
Find BFC (hint: vertical angles)
yeah but i don't know what DFE is
so how would i use vert angles
Find it via law of cosine
The intersection of two straight lines create 4 angles
The Oppisite/vertical angles are the same
Lemme find a image from google
Find DFE using law cosines then BFC
From there, say BFC = y
X^2 = 64^2 + 36^2 - 2•64•36•cos(y)
Read my first message here, where I explained it, or look at google
I cant give a direct answer as you wont learn anything
I can learn from it afterwards. I don't understand this topic and thus this is very confusing