(a)[2]
A straight path runs from $D$ to the midpoint of $AB$ across the field. Draw this path and measure the angle it makes with $DC$.
(b)[4]
Grass will be planted in part of the field. This area must be less than $325\text{ m}$ from $B$, must lie closer to $CB$ than to $CD$, and may be placed only on one side of the path. Use suitable loci to determine and shade the greatest possible grassy area.
(c)[1]
Calculate the real length of the section of the path that acts as a boundary for the grass.