Question

The Great Pyramid near Cairo is one of
history’s most spectacular achievements. Its
base covers an area large enough to hold 10
football fields. If the base of a pyramid is a
square 400 m on a side, how long would a
walkway that went around the entire pyramid
halfway up be?

1. thuhuong
Based on the given information, the walkway would be 800 meters long if it is only halfway.

### What is the perimeter?

In geometry, the perimeter can be defined as the total length of the boundary of a geometrical shape. This differs from the area because the area focuses on the space inside the shape.

### What is the perimeter of the pyramid?

The perimeter of a square can be calculated by adding up the length of its sides, as shown below:
400 + 400 + 400 + 400 = 1600 meters
This means the total perimeter is 1600 meters.

### How long would the walkway be?

Considering the walkway needs to cover only half of the perimeter o be halfway up, the length would be:
1600 / 2 = 800 meters.
Based on this, it can be concluded the total length of this walkway would be 800 meters.