Similar Shapes

What is the scale factor of enlargement between these two shapes?

• 2

• $\frac{1}{10}$

• 20

• $\frac{1}{2}$

What is the scale factor of reduction between these two shapes?

• 2

• $\frac{1}{10}$

• 10

• $\frac{1}{2}$

Find the missing side, denoted by x.

• 1500

• 4

• 15

• 400

Find the missing side, denoted by x.

• 8cm

• 16cm

• 9.6cm

• 10cm

Find the missing side, denoted by x.

• 6

• 4.5

• 3.5

• 9

Why can these shapes no longer be considered similar?

• The lettering on the shapes don't match

• The third side of the triangle doesn't have a value

• The sides are not in proportion

• The angles are not the same for both shapes

Find the length of side BD.

• 7.5cm

• 10cm

• 2.5cm

• 5cm

Find the length of side AE

• 15cm

• 10cm

• 5cm

• 7.5cm

Why are these similar triangles?

• They are both triangles

• They have a parallel sides and connected vertices

• They both have one number length and one number length

• There is a cross angle in the centre of the diagram

Find x.

• 5.625

• 5

• 9.375

• 9