1. Objective: To apply the Law of Sines
Essential Understanding: If you know the measures of two angles and the length of a side(AAS or ASA), or two side lengths and the measure of a nonincluded obtuse angle (SSA), then you can find all the other measures of the triangle.

2. Find h using angle B. Find k using angle A. Find h using angle C.
Find k using angle C.
The Law of Sines
For a triangle with angles A, B, and C and sides of lengths a, b and c (a opposite A, b opposite B and c opposite C), A A h b b c c k C C B a B a

3. p. 525: 1-12 Find the measure of acute angle B in ΔABC
Find the length of AC in ΔABC, to the nearest cm
Find the measure of acute angle B in ΔABC A A b
350 cm
290
250 cm
690
380 C B C
350 cm B
p. 525: 1-12