this is geometry.

I need help on 10 and 11. I have no clue what to do on 10 so please step by step explanation and for 11 I tryed it but I think I got it wrong so please check and let me know how to fix it if needed​

this is geometryI need help on 10 and 11 I have no clue what to do on 10 so please step by step explanation and for 11 I tryed it but I think I got it wrong so class=