Question

PLEASE HELP

1. Find the length of a. (2 points)
2. Find the missing side length. (2 points)

Answer 1

1. a =22.184 (rounded 3 decimal places)

2. missing length = 13.318 (rounded 3 decimal places)

Explanation:

1. use law of cosine

a= sqrt( 12^2 + 15^2 - 2(12)(15)(cos110) )

a =22.184 (rounded 3 decimal places)

2. use law of cosine

missing length = sqrt( 8^2 + 18^2 - 2(8)(18)(cos43) )

missing length = 13.318 (rounded 3 decimal places)