Find the area of the polygon
9 in. by 11 in.
height 3
wouldn't it be 30 in^
It depends on the polygon.
To find the area of a polygon, you typically need to know the shape and the side lengths. In this case, you have mentioned the side lengths, but you haven't specified the shape of the polygon.
If you have a rectangle, which has four sides with opposing sides of equal length and four right angles, you can use the formula: area = length x width.
In this case, you mentioned a rectangle with dimensions 9 inches by 11 inches. To find the area, you would multiply the length (9 inches) by the width (11 inches), giving you an area of 99 square inches.
However, if you have a different polygon shape, please provide more information about its sides, angles, or any other relevant details so I can help you determine its area.