Power Theorems – Chords, Secants & Tangents – Circle Theorems – Geometry



This geometry video tutorial provides a basic introduction into the power theorems of circles which is based on chords, secants, and tangents. It covers the chord chord power theorem, the secant tangent power theorem, and the secant secant power theorem. The chord chord power theorem states that the product of the segments of two intersecting chords are equal. The secant tangent power theorem states that the square of the tangent segment is equal to the product of the secant and the external part of the secant segment when the tangent of the circle and the secant of the circle extend from a common endpoint outside of the circle. The secant secant power theorem states the products of the secants and the external part of the secant segments are equal. This geometry video contains plenty of examples and practice problems on circle theorems.

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All Comments

  • My teacher gave me activities and I'm having problem on the chord-chord part….

    I followed the steps until having to factor them. The quadratic equation is

    x^2-24x+72 = 0

    Is there a multiple of 72 that adds up to 24?

    Rusty June 3, 2020 8:58 am Reply
  • I have watched a good amount of your videos throughout the DLD experience. I would like to say, they really helped me and thank you for your time.!!!

    RiceDown June 3, 2020 8:58 am Reply
  • Thanks a lot!

    Rohit Kulkarni June 3, 2020 8:58 am Reply
  • Wth is math

    Ooga Booga June 3, 2020 8:58 am Reply
  • Thank you sir

    XDFROSTY June 3, 2020 8:58 am Reply
  • Thank you for everything but does it matter when to use t squared=es or t square root of es?

    VTVT225 June 3, 2020 8:58 am Reply
  • Exactly what I needs

    Kyle Kiger June 3, 2020 8:58 am Reply
  • 13:27 plz name the theorem

    Project tech creator June 3, 2020 8:58 am Reply
  • Sir please change blue color

    Samuel Jerem June 3, 2020 8:58 am Reply
  • I dont get the part when you need to factor the solution

    Gina gudoy June 3, 2020 8:58 am Reply
  • Yo Sir Su you here?! Cmon Michael show yurself

    Seth Leoric June 3, 2020 8:58 am Reply
  • ads are interrupting the lesson

    Baek Seju June 3, 2020 8:58 am Reply
  • I think you just mistype the "ab=cd", it should be "ab=ed".

    IamNormal June 3, 2020 8:58 am Reply
  • Is this kind of formula t^2= BC . BD you're using?

    wheein's dimple is illegal June 3, 2020 8:58 am Reply
  • Really super👌

    thiyaga rajan June 3, 2020 8:58 am Reply
  • What topic is on 0:01 to 1:58

    Elaiza Labradores June 3, 2020 8:58 am Reply
  • your voice is so soothing lol

    Anonymous Anonymoose June 3, 2020 8:58 am Reply
  • Thanks a lot

    Yogesh Rattan June 3, 2020 8:58 am Reply
  • thank u so much for helping me pass in ma full paper again.thank u once again.but i would also wish if u had questions on income tax

    Fatma Haramen June 3, 2020 8:58 am Reply
  • shit makes no sense confusing asf

    Marshall Jebb June 3, 2020 8:58 am Reply
  • 8:56 you blocked my brain

    I.K.O Music June 3, 2020 8:58 am Reply
  • this is really irritating me, I get how to do it but I am given stuff like x+2 and it is throwing me through a loop. What would you do in that case.

    I have solved my issue……

    Saber Boi June 3, 2020 8:58 am Reply
  • I see that we can derive the second formula directly from the third. Really interesting, thanks!

    Paul Shin June 3, 2020 8:58 am Reply
  • This helped me a ton. Thank you!

    Luke Teichert June 3, 2020 8:58 am Reply
  • For a•b=c•d. When they ask for the length of ab, would you add the two products or multiply them? (Say a=5 and b=3, would the length be 8 or 15?)

    Yours Truly June 3, 2020 8:58 am Reply
  • Imma download this sksksksk I HAVE TO REPORT THIS TODAY

    Empress Summer June 3, 2020 8:58 am Reply
  • ty for everything u saved my life

    mama mo June 3, 2020 8:58 am Reply
  • i want proofs of these theorems…..

    Burning Cliff Entertainment June 3, 2020 8:58 am Reply
  • Ur amazing

    vibhas novli June 3, 2020 8:58 am Reply
  • thank u very much

    Senty Thea June 3, 2020 8:58 am Reply
  • Of which class is this??

    Aman robetsganj June 3, 2020 8:58 am Reply
  • Your lesson is very insightful and fun, thanks alot.

    Alvin Wright June 3, 2020 8:58 am Reply
  • SURVIV

    Robert Kilbon June 3, 2020 8:58 am Reply
  • Tnx

    Juchelle Santos June 3, 2020 8:58 am Reply
  • 0:31 7:40 14:01
    Thank you for these formulas, helped me in my homework

    Melvic Bangug June 3, 2020 8:58 am Reply
  • Thank you for this video

    Bebian Becolli June 3, 2020 8:58 am Reply
  • Do you have a video about this way of solving quadratic equations?
    Thanks for saving my grades again

    Ehoeir Goudan June 3, 2020 8:58 am Reply

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