Tues 24thth Jan – Area Scale factors when dealing with similar shapes

LEARNING OBJECTVIE: Discover the relationship between the scale factor of enlargement and the area scale factor and then use this to solve problems

SUCCESS CRITERIA: You will be able to solve area problems using the relationship between area scale factor and linear scale factor

STARTER:

Here are the dimensions of some rectangles.

1. Which are similar
   
2. What is the scale factor of enlargement of the similar rectangles
   

	Rectangle A	Rectangle B	Similar	Enlargement Scale Factor
1	3cm x 5cm	6cm x 10cm
2	2.5cm x 8 cm	7.5cm x 24cm
3	1.2 x 6.4	16cm x 3cm
4	3.5cm x 7.8	10.15cm x 22.3
5	2.4m x 3.7m	25.532m x 16.56

1. PLEANRY: Checking answers, reminder of similarity
   

LESSON: Work through this lesson on Area scale factors, repeat questions screens if necessary