Please mark me brainliest! :D
Part 1) To find the measure of ∠A in ∆ABC, use
we know that
In the triangle ABC
Applying the law of sines
in this problem we have
therefore
the answer Part 1) is
Law of Sines
Part 2) To find the length of side HI in ∆HIG, use
we know that
In the triangle HIG
Applying the law of cosines
In this problem we have
g=HI
G=angle Beta
substitute
therefore
the answer Part 2) is
Law of Cosines
