五个字母 T、E、A、M 和 S 画在一个方格网中。

它不会直接告诉你答案，而是问你卡在哪一步看看 AI 是怎么陪你一步步弄懂这道题的

完整解法

1. Determine which letters have at least one line of symmetry

By inspecting the block letters:

2. Count the number of letters with a line of symmetry

The letters T, E, A, and M have lines of symmetry.
Total number of letters = $4$ .

答案

$4$

1. Identify letters with parallel lines

Looking at the letters:

2. Identify letters with perpendicular lines

Looking at the letters:

T: Has a horizontal top stroke and a vertical stem, which are perpendicular.
E: Has horizontal strokes and a vertical stroke, which are perpendicular.
A: No perpendicular lines.
M: No perpendicular lines (vertical and slanted strokes do not meet at $90^\circ$ ).
S: Curved, no perpendicular lines.

3. Find letters with both parallel and perpendicular lines

From the analysis:

T has perpendicular lines but no parallel lines.
E has both parallel lines (the three horizontal strokes) and perpendicular lines (horizontal strokes meeting the vertical stroke).
M has parallel lines but no perpendicular lines.
Therefore, only E has both.

答案

T, E

AI 分析，可能出错

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