What 2 things do you always need to say to describe an enlargement?
How many times bigger the shape is going to be?
Where is the center of enlargement.
What does centre of enlargement mean?
The point where the enlargement starts
What is a scale factor?
How many times the enlargement is bigger than the original
Explain how to work out the scale factor on a grid, and with no grid. Use diagrams
you have screenshot from the myimaths lesson.
On a grid you count the squares on one side of the original and how many more on the enlarged shape.
Without a grid you measure the center of enlargement to the center of both shapes.
What happens to the angle sizes in the corner of the shape when you enlarge it?
The angels stay the same because they have to add up to 180
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