# S3

Below you will find video lessons and worksheets for each topic in S3.  When completing the worksheets you should NOT answer every single question.  Find the right level of challenge for you and aim to answer 5 or so from each question or as many as it takes you to feel confident.

The “Apply” sections of the worksheets are very important as they test your ability to solve problems and answer worded problems – make sure you give them a go.

You may not be working through the topics in the order listed below but your class teacher can direct you to the correct topic.

### Circles – arcs and sectors

Video – arcs and sectors all worked examples

Worksheet – arc length

Worksheet – sector area

### Equations and inequalities

Video – equations with unknowns on both sides

Video – equations with brackets, fractions and inequalities

Worksheet – equations unknowns on both sides including ones with brackets

Worksheet – equations involving fractions

### Systems of Equations

Video – simultaneous equations all worked examples

Worksheet – solving systems graphically

Worksheet – solving systems algebraically

### Similarity

Video – all similarity worked examples

Worksheet – using length scale factor

Worksheet – using area and volume scale factors

### Fractions and Percentages

Video – fractions all worked examples

Worksheet – adding and subtracting fractions

Worksheet – multiplying fractions

Worksheet – dividing fractions

Video – percentages all worked examples

Worksheet – appreciation & depreciation

Worksheet – reversing a percentage change

### Statistics

Video – all examples for standard deviation and five figure summary

Worksheet – statistics past paper questions

### The Straight Line

Video – straight line all worked examples

Worksheet – finding the equation of a line

### Trigonometry

Video – intro to trig

Video – using trigonometry to find a length

Video – using trigonometry to find an angle

Worksheet – Trigonometry in right-angled triangles