Enlargement Recap over enlargement of shapes and key phrases(level 5) Understand how to enlarge a shape from a given point(level 6)
What we’ve covered • What is enlargement? • What does scale factor mean?
Look at your 2 questions in pairs • Enlarge the first by scale factor 2 • This means double the length • Enlarge the second by scale factor 0.5 • This means half the length
Marking • Swap with a partner and if possible give them • EBI • WWW
To enlarge the rectangle by scale factorx2 from the point shown. B / A/ Image D/ C/ A B Object C D Centre of Enlargement Simply Count Squares Enlarging with a given point 1. If a shape is being enlarged by scale factor 2 the shape has to be twice the size 2.It also has to be twice as far away from the centre of enlargement.
Enlargements from a Given Point Centre of Enlargement To enlarge the kite by scale factorx3 from the point shown. B A B/ C Object D C/ A/ Image Simply count Squares D/ X3 1. If a shape is being enlarged by scale factor 3 the shape has to be three times the size 2.It also has to be three times as far away from the centre of enlargement.
Enlargements from a Given Point To enlarge the triangle by scale factor x4 from the point shown. B C Object A Centre of Enlargement
Now try • Work on the sheet provided. • What do you need to remember? • If you are happy move onto the extension