# Teachers TV: KS3 Maths lesson starters, Geometry

This collection of KS3 Maths lesson starters all look at the topic of geometry.

# Teachers TV: Secondary Maths KS3 lesson starters - Geometry

This collection of KS3 Maths lesson starters all look at the topic of geometry.

The videos can be used at the beginning of a lesson in order to to pose geometrical problems, and to get students thinking about gemoetry in the context of the wider world.

**Durham Cathedral**

**Architecture and KS3 Maths - The Floor Plan of Durham Cathedral**

How do you measure the floorplan of a cathedral using a simple compass?

**Architecture and KS3 Maths - Measuring Height in Durham Cathedral**

The challenge is to measure one of Durham Cathedral's towering columns, using rope, a metre rule and similar triangles.

**Architecture and KS3 Maths - Symmetry and Circumference in Durham Cathedral**

Discover hidden symmetry in Durham Cathedral, and how to find the circumference of one of the columns.

**Architecture and KS3 Maths - Finding the Golden Ratio in Durham Cathedral**

Investigating the proportions in Durham Cathedral and the ratios that are very similar to the golden ratio.

**Architecture and KS3 Maths - Hidden Patterns in Durham Cathedral**

Mathematical challenges and brain teasers which are linked to some magical number patterns.

**Triangles**

Maths expert Isaac Anoom goes to the seaside to pose questions about the properties of triangles and gives some helpful clues and answers.

**More Secondary Maths video collections**

Ideas on how to use these resources

**KS3 Maths Lesson Starters - Shopping Mall**

**KS3 Maths Resources - Number and calculation**

**KS4 Maths Resources - Painting with Numbers**

**KS4 Maths Resourcecs - Inside Maths**