HINT Consider triangles ABC and ABF. Each has side AB of length c. We could use the Law of Cosines to get expressions for c. This may not be the only way to go. Consider other options too.
HINT
Consider triangles ABC and ABF. Each has side AB of length c. We could use the Law of Cosines to get expressions for c. This may not be the only way to go. Consider other options too.
Consider triangles ABC and ABF. Each has side AB of length c. We could use the Law of Cosines to get expressions for c.
This may not be the only way to go. Consider other options too.
