Answer:
2.1
Explanation:
Length of the segment BC can be obtained by using cosine law.
cos A =(b^2 + c^2 - a^2) /2bc
cos 20° = (5^2 +6^2 - a^2) /(2*5*6)
0.9396926208 = (25 + 36 - a^2) /60
0.9396926208 * 60 = 61 - a^2
56.3815572 = 61 - a^2
a^2 = 61 - 56.3815572
a^2 = 4.6184428
a = 2.14905626
a = 2.1 units
Hence, lenght of BC = 2.1 units.