Danny brought a car for £10000 the value of the car depreciated by 20% in the first year then the value of the car depreciated by 10% in the second year work out the value of dannys car at the end of two years

£7200

In first year depreciates by 20%, that is it is worth 80% of it's original value

80% = = 0.8

value after 1 year = 0.8 × £10000 = £8000

In the second year it depreciates by 10% of it's value, that is it is worth 90% of it's value at the end of the first year.

90% = = 0.9

value after 2 years = 0.9 × £8000 = £7200

ca = ec

cpctc makes it so that corresponding parts of the triangle you proved to be equal are equal, the other options aren't part of the part of the triangles you proved to be equal.