Every Circle Theorem Explained | Maths GCSE (Higher)

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This video covers the nine circle theorems that you need to understand before sitting your maths GCSE exams, along with some example question walkthroughs. Here is a brief summary of the nine theorems:
1.) A tangent and a radius must always meet at 90 degrees
2.) Two radii form an isosceles triangle
3.) The perpendicular bisector of a chord passes through the centre of a circle
4.) The angle at the centre of a circle is twice the angle at the circumference
5.) The angle in a semi-circle is 90 degrees
6.) Angles in the same segment are equal
7.) Opposite angles in a cyclic quadrilateral add to give 180 degrees
8.) Tangents from the same point are the same length
9.) The angle between a tangent and a chord is equal to the tangent in the opposite segment (the alternate segment theorem.)
We hope this helps!

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THIS VID IS SO GOATED, I SWEAR IVE BEEN TRYING TO UNDERSTAND ALTERNATE SEGMENT AND YOU HAVE FINALLY DONE IT. GREAT VID 10/10 I HAVE TRANSCENDED

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the animations are goated best vid on circle theorms for sure

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This video is amazing, watched it 3 times and now I'm a pro at solving angle property questions in a few minutes

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thanks man the explanation is very good, i was struggling to understand alternate segment theorem you made it simple.Thanks once again!

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perfect explanation better than my teacher by a lot

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Glad it helped!

[@umeshsingh-lh5ow]

hey! you are doing a great great job teaching but I just had a little doubt in the last theorem that what if the angle is not opposite but rather beside it or if there are two angles given which one will be the same of the one touching the tangent?

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how about we tweak theory 9 to The angle between the tangent and the chord i always equal to the angle formed by the chord in its opposite segment.

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Dunno why but theorem number 9 is easy to remember if you remember it as the dorito chip theorem

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As an Indian...HOW is this "higher level"?

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this is for 9th grade in gcse too...there is diff variations of math in gcses....

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It’s class 9 for all of us.

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Different education systems, obviously

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Exams tomorrow morning

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radii is pronounced ray di eye.

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This is 9th grade stuff 😂

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