## GCSE - AQA Link Paired Pilot Methods 2 - Higher

### Geometry topics from grade B to A*

 G7 - Circle theorems (angles) This video demonstrates all the angle based circle theorems you need for GCSE maths. Then in the links below there will be lots of practice questions for you to check you can do them in varing situations. General Tutorial:-  maths247 - Excellent revision & practice    Hegarty recap and demonstration  Worked exam questions:-  RawMaths-1  2  3  4  5  6  7  maths247-1  2  3  4  harder-1  2  3  4  5  6  7 G8 - Circle theorems (lengths) This video from maths247 explains the intersecting chord theorm for both versions, where they cross inside the circle and when they cross outside the circle. Worked exam questions:-  RawMaths-1  2  3  MyMaths revision :-   Intersecting Chord - Lesson    Intersecting Chord - Worksheet G9 - Proof of congruence of two triangles Maths247 goes through the different cases that prove triangles of congruence followed by a couple of examples of exam questions. This is not a common topic and It has not been on any of the exam papers so far, but this doesnt mean it wont be on the next one. Worked exam questions:-  maths247-1  2  3  MyMaths revision :-   Proof of Congruence - Lesson  Proof of Congruence - Worksheet G10 - Enlargements with Fractional and negative scale factors Too be added in soon. Worked exam questions:-  RawMaths-1  2  Maths247-1  2 G12 - Vector geometry This video is the first in a play list that includes practice questions. It is a bit old school as early maths247 videos are videos of him writing on paper but as always quality teaching. General Tutorial:-  maths247 - Intro 1  2  old demo of basics  Worked exam questions:-  Rawmaths-1  2  3  maths247-1  2  3  4  5  6  7  8  9  10  11  12 G13 - Similar shapes length, area and volume In this video Hegarty explains what we mean by the word similar in mathematics, it also goes through how to change from a length to area to volume scale factor and does a few nice examples. Check out the Maths247 video which is very similar (no pun intended) Interactive Practice from CIMT :-   Similar shapes (lengths)  Len,area and vol scale factors  Worked exam questions:-  RawMaths-1  2  3  4  HegartMaths  Maths247-1  2  General Tutorial:-  maths247 - Similar Triangles  Length,Area,Vol scale factors G14 - Pythagoras' theorem in 3D This video is the first of three videos from "Mathslessons" that goes into detail about using Pythag in a cuboid, check out mathslessons 2/3 below for the other 2. General Tutorial:-  Mathslessons part 2  Mathslessons part 3  Worked exam questions:-  Maths247 G15a - Trigonometric ratios in right-angled triangles This video recaps the method used to find the missing angle in a right angled triangle when you are given two side lengths. There is an example for each of the three trig ratios sin, cos and tan. It also works through three examples of finding lengths when given an angle and a side on for each of sin, cos and tan. Interactive Practice from CIMT :-   Using trig functions  Finding Sides  Finding Angles Worked exam questions:-  RawMaths(angles)-1  2  3  4  5  RawMaths(sides)-1  2  1  2  3  General Tutorial:-  3D-1  2  3  4  5  Pyramid 1  2  3 G15b - Sine and Cosine rules for any triangle Hegarty explaining the basics of the sine and cosine rule for any triangle, along with some demonstration questions. Worked exam questions:-  RawMaths-1  2  3  4  5  6  7  8    Hegarty sine and cosine rule exam quesitons  General Tutorial:-  maths247 - one stop tutorial and exam practice G18 - Area and Perimeter of sectors of circles This video starts with some basic circle info but works through sectors from the point at which I linked it, this topic can be really tricky try the Maths247-2 for something difficult. Worked exam questions:-  RawMaths-1  2  MathsLessons  Maths247-1  2  General Tutorial:-  HegartyMaths  ExamSolutions  maths247 G19-Calculate the area of triangle using 1/2abSinC This video starts with some basics on triangles but I have linked from the section on the formula for any triangle where you have an angle and the two sides either side of it. Like most exam questions using this rule it comes after a cosine rule part in the following. Worked exam questions:-  ExamSolutions  RawMaths-1  2  maths247  General Tutorial:-  maths247 G21 - Volume of Cones, Pyramids, Spheres Too be added in soon. Worked exam questions:-  RawMaths  Maths247-1  2  MyMaths revision :-   Cones and Spheres - Lesson  Cones and Spheres - Worksheet G21 - Volumes of Frustum's Quick demo of how to work out the frustum of a cone. Worked exam questions:-  RawMaths  Maths247-1  2 G21 - Conservation of volume problems Too be added in soon. Worked exam questions:-  Rawmaths  2  Maths247-1  2  3  4