## Lines and Angles

## OVERVIEW

Students will build on their KS2 skills using rulers and protractors to construct and measure increasingly complex diagrams using correct mathematical notation. This will include three letter notation for angles, the use of hatch marks to indicate equality and the use of arrows to indicate parallel lines. Pie charts will also be studied here to gain further practice measuring and drawing angles. Basic geometric language, names and properties of types of triangles, quadrilaterals and polygons will be introduced this half term. Angle relationships will be built on from knowledge and understanding from KS2 to include the use of parallel lines.

## BUILDING ON

Forming and solving linear equations

Addition and Subtraction of decimals

Types of angles

Drawing and measuring angles with a protractor

## POWERFUL KNOWLEDGE

- Letter and labelling conventions for geometrical figures
- Accurately work with a protractor
- Identify different types of angle, triangles and polygons up to a decagon
- Interpret and draw pie charts
- Angles facts including vertically opposite angles and angles in parallel lines
- How to calculate the interior angle sum of a polygon
- Construct different types of triangle including SSS, SAS and ASA triangles

## LESSON RESOURCES

**Constructing, measuring and using geometric notation **

Lesson 3 – Interpret Pie Charts

Lesson 5 – Construct ASA and SAS triangles

Lesson 6 – Construct SSS triangles

Lesson 7 – Constructing Polygons

**Developing Geometric Reasoning **

Lesson 11 – Angles on a Straight Line

Lesson 12 – Vertically Opposite angles

Lesson 13 – Angles in Triangles

Lesson 14 – Angle Problems using properties of Triangles

Lesson 15 – Triangle Venn Problems

Lesson 16 – Angles in Quadrilaterals

Lesson 17 – Investigate angles in parallel lines

Lesson 18 – Understand and use angles in parallel lines

Lesson 19 – Find and use angle sum of any polygon