Ron Barrow

Circles and Tangents - 2 Theorems

Ron Barrow

Circle Theorems - Angle at the Centre

Ron Barrow

Upper and Lower Bounds 2 - dealing with calculations

Ron Barrow

Upper and Lower Bounds 1 - how to calculate them

Ron Barrow

The Angle in a Semicircle

Ron Barrow

Opposite Angles in a Cyclic Quadrilateral

Ron Barrow

Angles in the Same Segment of a Circle

Ron Barrow

Congruent Triangles 5 - The RHS (Right angle, Hypotenuse, Side) Rule

Ron Barrow

Congruent Triangles 4 - The AAS (Angle, Angle, Side) Rule

Ron Barrow

Congruent Triangles 3 - The SAS (Side, Angle, Side) Rule

Ron Barrow

Congruent Triangles 2 - The SSS (Side, Side, Side) rule

Ron Barrow

Congruent Triangles 1 - Introduction

Ron Barrow

Geometric Series - Proof of the Formula for the Sum of the First N Terms

Ron Barrow

Three More Constructions

Ron Barrow

Perpendicular Bisectors 1 - how to draw a perpendicular bisector with ruler and compasses only

Ron Barrow

Angle Bisectors 1 - Bisecting an Angle with ruler and compasses only

Ron Barrow

Arithmetic Series - Proof of the Sum Formula for the First n Terms

Ron Barrow

Surds (Radical Expressions) 5 - Rationalising the Denominator 2

Ron Barrow

Surds (Radical Expressions) 4 - Rationalising the Denominator 1

Ron Barrow

Surds (Radical Expressions) 3 - More basic rules for manipulating and simplifying.

Ron Barrow

Surds (Radical Expressions) 2 - Some basic rules for manipulating and simplifying.

Ron Barrow

Surds (Radical Expressions) 1 - What are Surds

Ron Barrow

Indices (exponents, powers) 6 - Simple Exponential Equations

Ron Barrow

Indices (powers, exponents) 5 - Fractional indices

Ron Barrow

Indices (powers, exponents) 4 - Zero and Negative Indices

Ron Barrow

Indices (powers, exponents) 3 - Powers of powers

Ron Barrow

Moving Averages 2

Ron Barrow

Moving Averages 1

Ron Barrow

Frequency Polygons

Ron Barrow

Indices (exponents, powers) 2 - Division

Ron Barrow