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3 years ago

Find the area of the triangle.

Mathematics

2 answers:

Klio2033 [76]3 years ago

8 0

Answer:

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

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

tiny-mole [99]3 years ago

4 0

The answer is B
The answer is B

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