# 3D triangle

**URL:** <https://discourse.shapr3d.com/t/3d-triangle/6004>\
**Category:** Modeling Questions\
**Created:** [November 10, 2019, 2:52pm UTC](https://discourse.shapr3d.com/t/3d-triangle/6004 "2019-11-10T14:52:28Z")\
**Posts on this page:** 8\
**Page:** 1

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**Author:** ![BenHoskings](https://avatars.discourse-cdn.com/v4/letter/b/c67d28/32.png) [@BenHoskings](https://discourse.shapr3d.com/u/BenHoskings)\
**Post date:** [November 10, 2019, 2:52pm UTC](https://discourse.shapr3d.com/t/3d-triangle/6004/1 "2019-11-10T14:52:28Z")

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Trying to make 4 triangles and 4 trapeziums, such that they form the shapes made by the construction axes, very new here, any help would be great.

 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/2X/6/6ef8d03112984a8862d13844a3fbff2a1c03db70.jpeg)

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**Author:** ![JST](https://avatars.discourse-cdn.com/v4/letter/j/edb3f5/32.png) [@JST](https://discourse.shapr3d.com/u/JST)\
**Post date:** [November 10, 2019, 3:59pm UTC](https://discourse.shapr3d.com/t/3d-triangle/6004/2 "2019-11-10T15:59:38Z")

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I think you should subtract from the octo prism .  
Like this:

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**Author:** ![BenHoskings](https://avatars.discourse-cdn.com/v4/letter/b/c67d28/32.png) [@BenHoskings](https://discourse.shapr3d.com/u/BenHoskings)\
**Post date:** [November 10, 2019, 4:22pm UTC](https://discourse.shapr3d.com/t/3d-triangle/6004/3 "2019-11-10T16:22:32Z")

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Hi, that looks promising, is there a video with sound so I can understand how to apply that to my problem?

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**Author:** ![JST](https://avatars.discourse-cdn.com/v4/letter/j/edb3f5/32.png) [@JST](https://discourse.shapr3d.com/u/JST)\
**Post date:** [November 10, 2019, 4:30pm UTC](https://discourse.shapr3d.com/t/3d-triangle/6004/4 "2019-11-10T16:30:51Z")

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Sorry , no sound.

You should make construction planes on both sides and poroject all edges to the plane.  
In that case you can edit your scetch on it .

 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/2X/3/3a02b0ba13cf1695490861a88c40569b1cb74ec1.png) ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/2X/8/8f46251b0961fc418f47fd0f02743e1e06d5bd00.jpeg)

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**Author:** ![JST](https://avatars.discourse-cdn.com/v4/letter/j/edb3f5/32.png) [@JST](https://discourse.shapr3d.com/u/JST)\
**Post date:** [November 10, 2019, 4:57pm UTC](https://discourse.shapr3d.com/t/3d-triangle/6004/5 "2019-11-10T16:57:56Z")

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More pics from the another sede:

 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/2X/8/8d82824aef8b34f86c70af73154b7513649fffb6.jpeg) ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/2X/a/ac74384cb18fd2fb327db9b3ea1d808f52774e20.jpeg)

Regards,  
A.

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<div class="post-metadata">

**Author:** ![JST](https://avatars.discourse-cdn.com/v4/letter/j/edb3f5/32.png) [@JST](https://discourse.shapr3d.com/u/JST)\
**Post date:** [November 10, 2019, 5:09pm UTC](https://discourse.shapr3d.com/t/3d-triangle/6004/6 "2019-11-10T17:09:43Z")

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Much more 🙂

 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/2X/d/de4b5f859d7d42571c36f7f1cc04c3093e3b0562.jpeg) ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/2X/c/c1553ac5e77853356c48dac9dc5c09fe03062dcc.jpeg)

You should only do this on 4 side:)

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**Author:** ![BenHoskings](https://avatars.discourse-cdn.com/v4/letter/b/c67d28/32.png) [@BenHoskings](https://discourse.shapr3d.com/u/BenHoskings)\
**Post date:** [November 10, 2019, 8:53pm UTC](https://discourse.shapr3d.com/t/3d-triangle/6004/7 "2019-11-10T20:53:44Z")

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That’s really helpful, thanks you

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<div class="post-metadata">

**Author:** ![JST](https://avatars.discourse-cdn.com/v4/letter/j/edb3f5/32.png) [@JST](https://discourse.shapr3d.com/u/JST)\
**Post date:** [November 11, 2019, 8:22am UTC](https://discourse.shapr3d.com/t/3d-triangle/6004/8 "2019-11-11T08:22:02Z")

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👍  
If you need thickness of the body like on your example, tap on the octogon face , then use the shell comand  
R,  
A.