Leroy's backyard is a rectangle that is three times as long as it is wide. what is the perimeter and the area of the yard? first draw a diagram to you solve the problem. let a be the width of leroy's yard. the perimeter is a+3a+a+3a or 8a. the area is l×w; so the backyard area is a×3a or 3a^2. suppose you know the area of the yard 7,500 square feet how can you find the value of a?

cone

Step-by-step explanation:

If in the image you can see that the vertex with the angle of 90° is in the (0,0), then, looking at only the changes in the other vertex, we have.

Before the rotation, we have one vertex in the x = 0 line, and other vertex in the y = 0 line.

After the rotation, the vertex in the y = 0 line will draw a circle, while the point in x= 0 will not do anything (because the point is colinear to the axis of rotation).

Then our figure has a circular base and ends on a point, connecting those figures we can se that the figure is a cone.