Law of Cosines: A triangular parcel of land has sides of lengths 120 feet, 190 feet and 173 feet. See below for the rest of the problem:

Question

a) What is the area of the parcel of land? Round answer to two decimal places.

Area =

b) If land is valued at $2200 per acre (1 acre is 43,560feet^2), what is the value of the parcel of land? Round your answer to two decimal places.

Value=

Answer 1

Use Law of Cosines to deteremine one angle.

Use A = (ab sin C) / 2 to determine area