Answer:
8
Step-by-step explanation:
The formula to find the area of a triangle is:

Plug in what we know:

Multiply:
Answer: it is A that right
Step-by-step explanation:
Equation for circle centered at origin:
x² + y² = r².
Therefore r² = (-4)² + (-2)² = 20, r = √20.
Hence d = 2r = 2√20 = 8.94 (2d.p.)