Many ways of doing it. Here're two:
1. Heron's Formula: Heron's formula - Wikipedia, the free encyclopedia
2. Use the cosine rule to get an angle. Then use the area formula Area .
Many ways of doing it. Here're two:
1. Heron's Formula: Heron's formula - Wikipedia, the free encyclopedia
2. Use the cosine rule to get an angle. Then use the area formula Area .