For 1–3, find the area of each circle. Use 3.14 for π. Round to the nearest tenth if necessary. 2. a circle with diameter 8.4 ft

55.4ft

Step-by-step explanation:

9514 1404 393

  55.4 square feet

Step-by-step explanation:

The formula for the area of a circle can be written as ...

  A = (π/4)d²

For the given values, this is ...

  A = (3.14/4)(8.4 ft)² = 55.3896 ft²

The area of the circle is about 55.4 square feet.

center= (-2,0)

radius= sqrt2/2

step-by-step explanation:

pentagon

step-by-step explanation:

the coordinates   a(5, -2), b(3,-1),c(-4,-4) d(-3,8) and e(-1,4) forms the vertices of the polygon when they are connected in order.

in order to classify that which polygon is it with the given coordinates, first count the number of vertices and then count the number of sides it can make with these vertices.

since, the given coordinates have five vertices, therefore, it will make five sides. moreover, pentagon is regular in nature therefore it will be convex.

now, a polygon with five sides is known as pentagon, therefore, the given polygon is the pentagon.