Arectangular yard measuring 35ft and 45ft is bordered (and surrounded) by a fence. inside, a walk that is 4ft wide goes all the way along the fence find the area of this walk

First, calculate the area of the rectangular yard.

A = L x W    where A equals area, L equals length, and W equals width.

According to your stated problem:

A = 31 x 49

A = 1519 square feet          <Area of Rectangular yard.

Prisms and pyramids are three-dimensional solid shapes that contain sides and faces that are polygons -- two-dimensional shapes with straight sides. Both shapes fall under the large category -- polyhedrons -- because the sides and bases are polygons.