The diameter of a circle is 40 m. Find the area of the circle in terms of pi

400π

Step-by-step explanation:

The formula for the area of a circle is πr²

First you have to calculate the radius by halving the diameter so radius is 20m.

Then you put in your calculator πx20²

This equals 400π (in terms of pi).

when rotating a figure 180 degrees, imagine that you are able to take the figure and turn it clockwise or counterclockwise around a center point. to rotate a figure 180 degrees, you will need to apply the rule (x, y) → (-x, -y). start by using a coordinate grid with coordinates for each vertex of the figure. the center point of the coordinate grid is located at (0, 0), which is what you will rotate the figure around. write down the original coordinates of the shape you are going to rotate. then, apply the rule. for example, coordinate (1, 2) becomes (-1, -2). another example would be, coordinate (-4, -2) becoming (4, 2). after you change each original coordinate to the rotated coordinate, you will draw your new figure.

step-by-step explanation:

answer: 800

step-by-step explanation: