The centre of enlargement and how many times the object has been enlarged.
What does centre of enlargement mean?
The centre of enlargement is a dot or a cross where the object expands from.
What is a scale factor?
The scale factor says how many times the object has been expanded or shrank.
Explain how to work out the scale factor on a grid, and with no grid. Use diagrams you have screenshot from the myimaths lesson.
For the ones on the grid you count one of the sides of the shape. Now if your scale factor is 2 you will double the squares and if the scale factor was three you will triple the sqaures and so on and so on.
For the ones with no grid you use a mirror to measure from one edge to the centre of enlargement and then you double triple or minus the amount of the scale factor same as the one with he grid.
What happens to the angle sizes in the corner of the shape when you enlarge it?
The angles stay the same because it makes no difference if you enlarge it. Also if you were to enlarge a triangle the angle still needs to add up to 180.
No comments:
Post a Comment