7 A triangular field of grass, \(A B C\), has boundaries with lengths as follows:
$$A B = 234 \mathrm {~m} \quad B C = 225 \mathrm {~m} \quad A C = 310 \mathrm {~m}$$
The field is shown in the diagram below.
7
- Find angle \(A\)
7 - Farmers calculate the number of sheep they can keep in a field, by allowing one sheep for every \(1200 \mathrm {~m} ^ { 2 }\) of grass.
Find the maximum number of sheep which can be kept in the field \(A B C\)
[0pt]
[3 marks]