Enlargements

Front

What is an enlargement in geometry?

Back

An enlargement is a transformation that increases the size of a shape by a scale factor, while maintaining its proportions.

Front

What does the scale factor indicate in an enlargement?

Back

The scale factor indicates how much larger or smaller the new shape will be compared to the original shape.

Front

If the scale factor is greater than 1, what type of transformation occurs?

Back

An enlargement occurs.

Front

If the scale factor is less than 1, what type of transformation occurs?

Back

A reduction occurs.

Front

What is the centre of enlargement?

Back

The centre of enlargement is the fixed point in the plane from which the shape is enlarged.

Front

How do you calculate the coordinates of a point after enlargement?

Back

Multiply the original coordinates by the scale factor.

Front

What happens to the shape's angles during an enlargement?

Back

The angles of the shape remain the same during an enlargement.

Front

What is the effect of a negative scale factor in enlargement?

Back

A negative scale factor reflects the shape across the centre of enlargement and changes its size.

Front

Describe the transformation that takes a shape from (1,2) to (4,8) with a scale factor of 4.

Back

This is an enlargement with a scale factor of 4.

Front

What is the new position of the vertex (3,4) after an enlargement by a scale factor of 2 from the centre (0,0)?

Back

The new position is (6,8).