text: 13. SAS, use the cosine rule: b2 = a2 + c2 - 2 x a x c x cosB\n\n14. AAS, use the sin rule: sinA/a = sinB/b = sinC/c\n\nCapital letters indicate Greek letters and a "2" behind a letter indicates a "squared" in ths anser. Hope it's all good!!!