(a) Describe briefly the Gunters' chain. (b) A farmer surveyed his triangular farmland with a base length of 2 km and a perpendicular length of 1200m. Calcu...

(a) Describe briefly the Gunters' chain.

(b) A farmer surveyed his triangular farmland with a base length of 2 km and a perpendicular length of 1200m. Calculate the area of the farm.

(c) State four necessary precautions that should be taken in order to eliminate errors when chaining a farmland.

(d) List four factors required in choosing a site for a new school garden.