Question

一个边长为 $8$ 的正方形被切成两块全等的长方形。每个长方形的边长是多少？

A square with side length $8$ is cut in half, creating two congruent rectangles. What are the dimensions of one of these rectangles?

$2 \text{ 乘 } 4$

$2 \text{ by } 4$

$2 \text{ 乘 } 6$

$2 \text{ by } 6$

$2 \text{ 乘 } 8$

$2 \text{ by } 8$

$4 \text{ 乘 } 4$

$4 \text{ by } 4$

$4 \text{ 乘 } 8$

$4 \text{ by } 8$

每个长方形都有一条边仍然是 $8$ 。

One side of each rectangle stays $8$

另一条边是正方形边长的一半。

The other side is half of the square side length

注意其中一条边仍与原正方形的边长相同。

因此一个尺寸是 $8$ ，另一个尺寸是原边长的一半，即 $4$ 。

所以正确答案是 E。

Note that the one of the sides remains the same as the original square.

This means that one dimension is $8.$ The other dimension is the original side cut in half, which is $4.$

Thus, E is the correct answer.