Hello Nancy

In question 1, D is missing, but I assume it's where the line from C meets AB.

So, look at :

So

Now use :

, since is impossible in this case.

I think you may have written down some of the other questions wrong as well. But here are a few pointers.

2 Note that , and then express all the lengths in terms of . So:

?

Substitute all these values into , and divide through by .

I think you have written 2(b) wrong. It doesn't work out as you have written it.

3 Express and in terms of . Again, I think you haven't written the result correctly. I think it should be

The result then factorises:

4 Should there be some more information in the diagram? Have you written the result correctly?

Grandad