Geometrical Transformation: Enlargement

This animation shows how enlargement transforms a shape using a centre of enlargement and a scale factor. It visualises rays drawn from the centre through each vertex, showing how the image points are positioned proportionally further along these lines. Students see how scale factors greater than 1, between 0 and 1, and negative values affect the size and position of the resulting shape, supporting GCSE, IGCSE, Edexcel, and O Level coursework on transformations.

Narrated · 16:9 · Preview before teaching · automatic layout checks do not establish subject accuracy

The prompt that made it

Create Geometrical Transformation: Enlargement Audience: IGCSE, GCSE, EDEXCEL, and O level students

Make your own version

Make the next one in this series

• Show how negative scale factors invert and reposition a shape during enlargement
• Compare enlargement with reflection, rotation, and translation on the same coordinate grid
• Demonstrate how to find the centre of enlargement and scale factor from two similar shapes

Related animations

Polygon Similarity Versus Triangle Similarity

This animation compares how similarity is defined for general polygons versus triangles. It shows that similar…

Why the area of a circle is pi r^2

A circle is sliced into 16 equal sectors, then unfolded and reassembled into a shape resembling a rectangle wi…

Pythagorean Theorem With A 3-4-5 Triangle

A right triangle with legs 3 and 4 units and hypotenuse 5 units is drawn on screen, with squares built on each…

Why a² + b² = c²: rearrange four triangles

Two identical large squares each contain four congruent right triangles arranged differently. In one square th…

Constructing An Equilateral Triangle With Compass

This animation demonstrates the classical ruler-and-compass method for constructing an equilateral triangle wi…

Drawing A Line Segment With A Ruler

This animation demonstrates how to construct a line segment of exact length using a ruler, a foundational skil…