Answer:
I think it's the second one
For 2, they would be:
2. 4
3. 5
4. 0
5. 8
The equation of the circle shown is:

<h3>What is the equation of a circle?</h3>
The equation of a circle of center
and radius r is given by:

From the graph, it can be seen that the center of the circle is (0,0), thus
and the radius is of r = 10, hence the equation is:

You can learn more about the equation of a circle at brainly.com/question/24307696
The area of a triangle is 1/2*base*height so 1/2*10*8 which is equal to 40in²