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Mathematics 19 Online
OpenStudy (anonymous):

@jigglypuff314 Im starting to figure everything out, but proof is a pain in the butt.

jigglypuff314 (jigglypuff314):

Hi! (sorry, I was eating dinner before) what do you need to prove?

OpenStudy (anonymous):

Sorry for the two column proof <3

jigglypuff314 (jigglypuff314):

1. CA = EA (Given) 2. BA = AD (Given) 3. angle CAB = angle DAE (vertical angles are congruent) 4. triangle ABC = triangle ADE (SAS)

OpenStudy (anonymous):

jigglypuff314 (jigglypuff314):

I don't like this one... I get it, but it'll take a while...

OpenStudy (anonymous):

lol

jigglypuff314 (jigglypuff314):

they both end up being SAS just saying...

jigglypuff314 (jigglypuff314):

for the triangle one... AD = DC (definition of midpoint) angle BDC = angle BDA (Given) BD = BD (reflexive property of equailty) triangles congruent (SAS)

OpenStudy (anonymous):

My only problem with two column proof is that idk how much you have to write... :/ Like how many reasons and that stuff.

jigglypuff314 (jigglypuff314):

supposedly every reason for every thing 0.o truthfully, I probably skipped a lot of "this is a __, by definition"

OpenStudy (anonymous):

Ah oh well.. and btw im getting really good with trapezoid :D So i don't need your help for that ;3 You're honestly the best :D

jigglypuff314 (jigglypuff314):

given given GT = GT (reflexive property of equality) triangles are congruent (SSS) angles are congruent (because triangles are congruent) I'm getting lazy ;P

OpenStudy (anonymous):

oo thats bad xD

OpenStudy (anonymous):

Last one.. and can you try the other one i sent you ?

jigglypuff314 (jigglypuff314):

Given Given angle C = angle A (alternate interior angles) triangles are congruent (AAS)

OpenStudy (anonymous):

Great thanks! Can you figure out the other one you were to lazy to do?

jigglypuff314 (jigglypuff314):

angle BDC = angle EDC (Given) FC = FD (converse of definition of isosceles triangle?) angle BFC = angle EFD (veritcal angles are congruent) angle BCF = angle EDF (I don't remember why :P ) (^ along the lines of same angle minus same angle = same angle) triangle BFC = triangle EFD (ASA) BC = ED (congruent triangles = congruent sides) CD = CD (reflexive property of equality) angle BCD = angle EDC (Given) triangles are congruent (SAS)

jigglypuff314 (jigglypuff314):

whops typo first line ECD not EDC >,<

OpenStudy (anonymous):

Thank you so much!

jigglypuff314 (jigglypuff314):

I really didn't like that one >,<

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