for the goat one, the first one you had to explain how it would be a 8cm semicircle, then for the next one draw a 21cm circle, i had no working compass so i draw a rough one and put notes explaining i realise it would be 21.5cm in diameter and go outside the perimeter of the field.
Mountain one i did a little bit of working out then guessed, and the last question factorised the top line and left rest.
P.s, you can drop 25 + marks and still get an A