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I'm not familiar with these 2 column proofs but basically because a || b the internal angles <1 and <4 , and <2 and <3 both add up to 180 degrees. So since we are given that <1 = <4 then <2 must be equal to <3.
|dw:1443390778808:dw|Always start with what is given :)
Hmm I'm not sure what would be the fastest way to finish this... I like welsh's idea of using the fact that we have two pairs of supplementary angles and doing some business with that. But maybe we have some trapezoid rule we can use to shorten it :o
also are you familar with other things in geometry? need help with other problems
Let's just use welsh's idea :)
|dw:1443391104222:dw|This is the reasoning that I would give.
|dw:1443391195749:dw|by the same reasoning
Since <1 and <4 are the same, hmm <2 and <3 must be the same... Bahh I dunno >.< There's probably a better way to do these last few steps... grr
Grr I wish jim was online :P
lol help me with these then!
\[\large\rm V=LWH\]Notice that L is being `multiplied` by W and H. How do we undo `multiplication`? What is the opposite of multiplication?
good website to practice https://www.mathsisfun.com/geometry/parallel-lines.html
scroll down a little where u see *choose one * ^^^`