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When Tenshinhan prepares to launch the shin kikoho, he puts his hands in the
form of a triangle.

![Oh snap~](https://i.stack.imgur.com/gLi8N.jpg)

However, the attack ends up in the form of a square according to the destroyed
area.

![OOOOOH SCHANP!!!](https://i.stack.imgur.com/EQ4ON.jpg)

Does anyone have a good explanation for this?

**EDIT**

Thanks for everyone, I've checked the manga chapters, and it seems that he
puts his hands in a diamond shape, apparently, there was a mistake when making
it into anime


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question
dragon-ball
Is the Tenshinhan's Shin Kikoho technique, a triangle or square?


Though he put his hand in the form of triangle, the hole is in
square/rectangular form. The answer is quite scientific. A [Reuleaux
triangle](http://en.wikipedia.org/wiki/Reuleaux_triangle) can be rotated to
create a square shape. This [YouTube
video](https://www.youtube.com/watch?v=L5AzbDJ7KYI) and this
[site](http://io9.com/5829336/the-triangle-that-makes-rectangular-holes)
explain it in more detail.

Tenshinhan's hand shape is similar to the Reuleaux triangle. Due to its shape,
while it rotates, its cutting edge cut the hole in a shape of square which is
shown in the gif below.

![Animation](https://i.stack.imgur.com/GfPtk.gif)


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answer


The attack leaves a square hole due to the way he holds his hands. When he
fires the attack normally he places his hand in a diamond shape and zooms into
his target. the attack then is shot and forms the square shape.

![enter image description here](https://i.stack.imgur.com/mZI37.png)

![enter image description here](https://i.stack.imgur.com/yPOPL.jpg)

as you can see that his hands put together form more of a diamond shape and
when he fires the attack it rotates and makes the square.

later in the series He changes the way his hands are placed and over laps the
thumbs and make a triangle shape with is hands instead of the diamond shape.

it is stated on [Ultra DragonBall
wiki](http://ultradragonball.wikia.com/wiki/Tri-Beam)

> Interestingly, this technique leaves a square hole in the ground, instead of
> a triangle.


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