What is the formula for enlargement?
What is the formula for enlargement?
New length = original length × scale factor. A triangle of base 3 m and height 2 m is enlarged using a scale factor 5.
How do you enlarge by a scale factor of 3?
- First draw ray lines from O to each corner of the triangle and extend them.
- Next measure the distance from O to each corner of PQR. Multiply this distance by 3 and plot the points P’ Q’ and R’.
- Finally join up the points P’ Q’ R’.
Where is the centre of enlargement?
The centre of enlargement may be outside an object, or it may be inside a shape, on an edge or at a corner. The image may overlap the shape or one may be inside the other. Enlarge the triangle PQR by a scale factor of 3 about the centre of enlargement O.
What is GCSE higher revision – enlargements?
GCSE Higher Revision – 8.5. Enlargements (Grades D-B). This resource is for GCSE Higher revision but could be adapted for KS3. This lesson goes through enlarging a 2D shape by a positive scale factors, using projection lines to enlarge 2D shapes and enlarging shapes with negative and fractional scale factors.
How do you enlarge 2D shapes for KS3?
This resource is for GCSE Higher revision but could be adapted for KS3. This lesson goes through enlarging a 2D shape by a positive scale factor, using projection lines to enlarge 2D shapes and enlarging shapes with negative and fractional scale factors. There are also two worksheets to assess students’ understanding of enlargement.
What is a Grade D enlargement?
Grade D: Enlargement with centre. Grade C: Enlargement with fractional scale factor. Something went wrong, please try again later. Thank you – this is an excellent resource. Nice split into different types of enlargement, useful powerpoint to explain. Used with Year 9 middle ability to go through the past lesson’s teaching.
