Answers.Body: <p>You are trying to assemble a triangle with inclined parts of 8 units in length and horizontal line is 7 units. The rest is math:</p>
  <p><code>∠α = cos⁻¹(3,5÷8) = 64.0555°</code></p>
  <p>Due to slight imperfection in LEGO assembly you can easily take a value of 64° for one side and 296° (you were close!) for another.</p>
  <p>I did a mock-up in LDCad and proved that it works with angle of 64°, as you can clearly see below:</p>
  <p><a href="https://i.sstatic.net/xrtyU.png" rel="noreferrer"><img src="https://i.sstatic.net/xrtyU.png" alt="enter image description here" /></a></p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2021-09-13T12:02:46.933Z
Answers.LastActivityDate: 2021-09-13T15:51:37.940Z
Answers.LastEditDate: 2021-09-13T15:51:37.940Z
Answers.UserDisplayName: Alex
Answers.Body: <p>To get the exact answer, this is what high school geometry and trig is useful for in the real world :)</p>
  <p>Alternatively, switch off collision detection and just try changing the angles in small increments (e.g. 1 degree) until it looks right. Type the angle into the box shown in the picture, don't try to rotate the parts with the mouse.</p>
  <p>Then switch collision detection on again to check if you were close enough.</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2021-09-13T11:31:28.207Z
Answers.LastActivityDate: 2021-09-13T11:31:28.207Z
Answers.UserDisplayName: alephzero
Body: <p>I am using clips to make a roof shaped like an isosceles triangle.</p>
  <p>This feels like one of those things that would be trivial with physical LEGO bricks, but it is near impossible with Stud.io.</p>
  <p>How can I calculate the angle that the roof needs to be at for the clip to hold the bar piece?</p>
  <p><a href="https://i.sstatic.net/L1Oa8.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/L1Oa8.png" alt="Roof" /></a></p>
  
Tags: <angles>
Title: Finding the angle for an isosceles triangle roof
UserDisplayName: Abijah
ThreadText: # Finding the angle for an isosceles triangle roof
  
  (Asked by: username_0 on 2021-09-13)
  
  I am using clips to make a roof shaped like an isosceles triangle.
  
  This feels like one of those things that would be trivial with physical LEGO bricks, but it is near impossible with Stud.io.
  
  How can I calculate the angle that the roof needs to be at for the clip to hold the bar piece?
  
  [![Roof](https://i.sstatic.net/L1Oa8.png)](https://i.sstatic.net/L1Oa8.png)
  
  **Tags:** angles
  
  
  ---
  
  ## 2 answers
  
  ### Answer by username_1 on 2021-09-13. Score: 11 | Accepted answer
  
  You are trying to assemble a triangle with inclined parts of 8 units in length and horizontal line is 7 units. The rest is math:
  
  `∠α = cos⁻¹(3,5÷8) = 64.0555°`
  
  Due to slight imperfection in LEGO assembly you can easily take a value of 64° for one side and 296° (you were close!) for another.
  
  I did a mock-up in LDCad and proved that it works with angle of 64°, as you can clearly see below:
  
  [![enter image description here](https://i.sstatic.net/xrtyU.png)](https://i.sstatic.net/xrtyU.png)
  
  
  ---
  
  ### Answer by username_2 on 2021-09-13. Score: 4
  
  To get the exact answer, this is what high school geometry and trig is useful for in the real world :)
  
  Alternatively, switch off collision detection and just try changing the angles in small increments (e.g. 1 degree) until it looks right. Type the angle into the box shown in the picture, don't try to rotate the parts with the mouse.
  
  Then switch collision detection on again to check if you were close enough.
  
  
  ---
  
  