Geometry -- Lesson 4.4 & 4.5 -- SSS, SAS, ASA, AAS

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Uploaded by on Nov 14, 2008

SSS, SAS, ASA, AAS

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Education

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  • likes, 4 dislikes

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Uploader Comments (MisterRutter)

  • Is there a Angle Side Side, ASS ?!

  • @FireDraggon544 SSA only works when the angle that is congruent is known to be greater than or equal to 90 degrees. Since it doesn't apply to all triangles, it doesn't make the cut! Also, it's called "Hypotenuse-Leg", or HL, when it's used to prove right triangles congruent.

  • How would you know which theorem to use though? Since in the first four triangles you showed that all sides were congruent, so their angles must be congruent as well.

  • @Sinadins When you go to prove the triangles congruent initially, you may only use known information to prove them congruent. You cannot say, "Since I know this is congruent, I can use any sides/angles I want". In the first 4 examples, the information provided was not always that the 3 sides were congruent -- only 1 example was like that. The other examples used at least one angle, so I used the theorem that fit best for each one.

  • like at 6:59, how do u know its not in the middle? like do u go clockwise or something? this helped a lot

  • @rcminit109 You can go counterclockwise or clockwise, either way will let you know whether the side is between the angles (ASA) or not (AAS).

Top Comments

  • Omg omg thank you thank you thank you so much! I learned more in 1 minute of this video than 5 days with my geometry teacher! You are definitely my life saver!

  • Thank u soo much I never got proofs until u explained it to me.

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All Comments (131)

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  • nice video

  • In the time he took explaning why he wasnt going to write out the given he could have been done with it already

  • does it matter the order you write the statements ?

  • @FireDraggon544 i asked my teacher that

  • @FireDraggon544 no it wouldnt work thts what i asked today in my class

  • I PAY LIKE 15,000 DOLLARS FOR SHITTY TEACHER... WHEN THERE IS THIS FOR FREE ON YOUTUBE??! GOD BLESS YOUTUBE!

  • You sir remind me some how of Harrison Ford.

    great vid!

  • HOLY SANTA CLAUS SHIT I FINALLY GET IT

  • why is it that i learn more in a 10 minute video than i do in four days of geometry class

  • i mean my dumbass teacher

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