HSK V7-9
Correct

重合

/ chónghé / 
Strokes

Definition

to match up/to coincide

Example

As a Verb
coincide
1
Zhè
这
liǎng
两
gè
个
sān
三
jiǎoxíng
角形
wánquán
完全
chónghé
重合
  
。

These two triangles coincide exactly.