Parallelogram Compass Construction 1 of 5

Proving parallelograms with compass constructions.

This is the first in a series of five videos simulating compass constructions of parallelograms. Each video explores a different theorem or definition.

1 - Constructing a quadrilateral with both pairs of opposite sides parallel.
2 - Constructing a quadrilateral with both pairs of opposite sides congruent.
3 - Constructing a quadrilateral with both pairs of opposite angles congruent.
4 - Constructing a quadrilateral with one pair of opposite sides both parallel and congruent.
5 - Constructing a quadrilateral with diagonals that bisect each other.

There is a worksheet for my class. Ask me for a pdf if you want to use this in your class.

[funnyfitz]

Me and my tutor both couldn’t figure this one out but you did! Thanks a ton!

[charliewarwick]

Thanks Jeff, this helped me. I will post if I got the question right!

[onyinyeanyaegbunam]

where did you get the software you used for this constructin

[DSPDevilDog]

Is there any reason that I couldn't set the "purple" compass at the distance from A to D and then use the intersection of the arc from B to the intersection of the new parallel line?

[samanthacruz]

what program are you using for this construction?

[official-obama]

Do you have to use the fact that a compass doesn't change it's angle to construct a parallelogram like this? I was looking for a construction like this specifically to not use that property

[bandit]

Nobody notice that he kinda sound like Heath Ledger's Joker? thats kinda cool

[mathophilicwaysbypriyankac]

will you please tell me which software are you using

[nomobuddha]

sir, I want to know the name of the software

[kubialex]

What software is that that you are using?

[akshayacrystal]

thanks it helped but you should be a bit loud it seems like you're whispering

[syzwnashrn]

What is the length of the compasses you use to make the arc?

[phoebe]

Great video! Slow... but you got it done, can you try to talk normally next time

[sangeetaveerwal]

Whatever you know in this video, Idid not understand anything. Can explain in the next video in a simple way

[LMichelli]

I'm a tutor. What is the software you are using?