ANGLE THEOREMS - Top 10 Must Know

Here are the top 10 most important angle theorems that you have to know to be successful in your math classes. This video covers angle theorems for various shapes including triangles and circles, and also parallel line theorems. Go to jensenmath.ca for FREE math resources and don't forget to subscribe to the channel if this type of material is helpful for you.
0:00 Supplementary and Complementary
2:33 Sum of angles in a triangle and polygon
5:52 Isosceles Triangle Theorem
7:20 Exterior Angle Theorem
9:34 Vertical Angle Theorem
10:36 Alternate Angle Theorem
13:20 Co Interior Angle Theorem
14:40 Corresponding Angle Theorem
16:25 Angle subtended by arc of circle
18:43 Angle at centre vs angle at circumference
20:24 Test on angle theorems

[@Srinath-S.]

Very useful this video sir thankyou !!! Answer is 1) a=68° , b=67° , c=113° 2) d=31° , e=81° , f=112° , g=68° , h=112° , 3) i=40° , j=80° This channel should be available in more languages

[@thedeathofbirth0763]

Thank you for the answers, In number two, angle e is given as 81º the adjacent angle to e is unknown, by straight angle theo it is 99º.

[@John-ti5lt]

It's good to see that we got the same answers.I think it's proof that we understood his explanations well ❤. Happy studies, my friend!

[@SambhaviJha-lz4tx]

can you tell me how did you find d?

[@jordanlake9178]

@@SambhaviJha-lz4txhow I found d was I first identified angle E to be 81 degrees because of alternate interior theorem and after that I noticed that angle e formed a vertical angle with the triangle and after that I added 81 + 68 and subtracted it from 180 ( the sum of angle in a triangle) and got the answer 31

[@jordanlake9178]

@@SambhaviJha-lz4txor a another way is you can spot out that angle e forms a line( supplementary theorem) so you can subtract it from 180 to get 99 and using the exterior angle theorem you create the equation D + 68= 99 resulting in 31

[@Your_Average_Rabbit]

im in 9th grade and i have exams in a few days. This is such a good revision for me lmao thanks for the awesome educational content you put out :)

[@kevinmadden1645]

Revision or Review? You ought to study for your English exam.

[@Astute-gf9th]

@@kevinmadden1645 You do know that one can quite literally revise their knowledge with a little summary or review. And even if they were wrong, that doesn't mean you should get ahead of yourself and go about with an insult on them.

[@ramunasstulga8264]

​​@@kevinmadden1645cry about it, socialist!

[@Your_Average_Rabbit]

@@kevinmadden1645 my grammar may not be the best, but i can certainly get a good revision off of this. It lets me recall everything, from the basics to the advanced, and does function like a quick way to revise. afterall this are just opinions being tossed in the air with no real or absolute way to verify the right or wrong. don't go on insulting someone like this as it may hurt them. try a more calmer approach at correcting someone next time if you do suggest some change.

[@alphasaffi9230]

Thank you sir your videos are useful to me

[@thedeathofbirth0763]

Jensen, I am going through all your courses, I would like to finish them all before September. Your courses are very much parallel to our curriculum. There is no white noise like making jokes and going off topic . You have a calming voice unlike Eddie Woo who is also a good teacher but for some reason he makes me stressed lol . I subscribed but I did not get any notifications for any of your new videos. As I mentioned you really value your and my time so your videos are packed with great reviews and most of the time they clarify what my teachers couldn't communicate to me. So I really don't want to miss any new videos. Can you please check why people aren't getting notification for your new ones? Thanks.

[@SaeidMOMENI]

I enjoyed. Enjoyable. Thanks. God bless You.

[@harrymatabal8448]

Parallel lines are FUN. Can you see the corresponding angles in F, cointerior angles in U and alternative sngles in N😂

[@Yes..imAyushi]

I have this in my syllabus this year, so this is useful. Thank you 👍

[@user-xn4xu6rk4c]

Thankyou so much ❤

[@aa-ng4ot]

That was very helpful.

[@hamzehalomari7520]

Very beautiful summary

[@SambhaviJha-lz4tx]

thanks that was very helpful..

[@ronaldoe.deleonii3760]

Tysmmmm. Can you make one for Combinatorics or whole Statistics and Probability?

[@shane-vj3pf]

Omg you are such a life saver

[@Marshmallow_0426]

This is so helpful

[@muhammadfaheem5213]

What app u use?

[@soumikdas3754]

I love this series It makes me recapitulate so much concepts

[@revnumber1025]

Can you do like levels of factoring or maybe derivative (I know you make these videos before but please make it again)

[@BestEyeEvaHad]

No bisector angle theorems 😢

[@happygamingahs12]

Sir please give next video in circles angles theorem

[@aguy5321]

5:52 My geometry teacher called this one the Base Angles Theorem

[@alexandrearaujodecarvalho]

Yes, that's right.

[@Khashayarissi-ob4yj]

With luck and more power to you.

[@SumitJaiswal-vp7lp]

How you created this video.. which software u used?

[@wisdomackah5765]

Sir please do video about college algebra

[@thedeathofbirth0763]

To the 5k viewers! You know as well as I do that this video is really helpful, how long would it take for you to click on the thumb up?!! So that other people can find it too...

[@Anantsharma12i-lp5ql]

Respect for you bro!l loved this vid!! Does anyone know a good course on geomtry on youtube???

[@jinjin1156]

your the best 🎉🎉🎉

[@jinjin1156]

you earned my sub

[@MangaMeld]

Thx

[@TDsdutditbuezur]

Nice It's going in my school😂

[@kheidlirio9391]

Answers: a=68° b=67° c=113° d=31° e=81° f=112° g=68° h=112° i=40° j=80°

[@HarsimranSarai-rb1og]

a= 69, c=112, b=68, e=81, f= 112, g=68, h=112, d=31, i= 40, j=80??? idkk my answers don't match up, but i found a by doing 180-112 which is 68

[@Jepleg]

a=68 c=113 b=67 g=68 d=31 e=81 f=112 h=112 i=40 j=80

[@matthewcaranto6390]

a=68° b=67° c=113° d=31° e=81° f=112° g=68° h=112° i=40° j=80°

[@rohitvakode1086]

a=(180-112=68°) by stright line c=(360-247=113°) b= (180-113=67°) d =(31° ) e =81°by interior angle theorem F= 180 - 68= 112° g= 68° h=112° i=40° J=2×40 =80° ❤❤❤❤❤❤thank you sp much to clear all fundamental theorems.. but please define trigonometry or 3d jeometry I

[@SambhaviJha-lz4tx]

A = 68 , B = 53, C = 123, D = ? , E = 81, F = 112, G = 68 , H = 112, I = 40 AND J = 80.

[@leighmunsayac6203]

D is 31 because E and the missing measure in the upper triangle form vertical angle

[@fas9320]

I need to learn English quickly 😢

[@davidbrown7142]

a = 68 b = 67 c = 113 d = 31 e = 81 f = 112 g = 68 h = 112 i = 40 j = 80

[@Termlz]

a = 68 c = 113 b = 67 g = 68 d = 31 e = 81 f = 112 h =112 i = 40 j = 80