Triangle Frustration is an Internet meme, originating from the video "Jin Guangfa·How many questions can you get right in the lecture hall," by Jin Guangfa, the main artist of Bilibili UP. In the video, Jin Guangfa solved some math problems in a humorous way. One of the questions is this: If the three interior angles of a triangle are obtuse angles, right angles and acute angles, what is the area of ??the triangle? Jin Guangfa’s answer is: triangle setback.

1. Jin Guangfa deliberately used a nonsensical answer to be funny, and the word "triangle" has no actual meaning, it is just a random combination of syllables.

2. This meme is used to express an attitude of not wanting to talk properly or deliberately talking nonsense.