Question

Find the area of the triangle.

Answer 1

Answer:

(D). 5 km²

Step-by-step explanation:

QR² = 11² + 14² - 2(11)(14)cos77°

QR ≈ 15.739 km

P = 14 + 11 + 15.739 = 40.739 km

s = $\frac{P}{2}$ ≈ 20.37 km

$A_{PQR}$ = $\sqrt{20.37(20.37-11)(20.37-14)(20.37-15.739)}$ ≈ 75 km²

Answer 2

The answer is B
The answer is B