Question

Please help: Trigonometry

Objective: Use trigonometry functions to find the area of triangles.
In ΔPQR, PQ=12, PR=3, and m< P=78. Find the area of ΔPQR, to the nearest tenth of a square unit

Answer 1

17.6 units²

Explanation:

½ × a × b × sin(theta)

½ × 12 × 3 × sin(78)

= 17.60665681