Question

In AKLM, m = 1.2 cm, k = 5.1 cm and

10th of a centimeter.
L=35º. Find the length of 1, to the nearest

Answer 1

4.2 cm

Explanation:

The law of cosines is applicable.

l² = k² +m² -2km·cos(L)

l² = 5.1² +1.2² -2·5.1·1.2·cos(35°) ≈ 17.4236

l ≈ √17.4236

l ≈ 4.2 . . . cm