<p>For this, use a construction line:</p>

<ol>
<li>draw the approximate line</li>
<li>press <code>x</code> to go into the construction-line mode</li>
<li>pres <code>l</code> for the line tool</li>
<li>Draw a line from the end to the base</li>
<li>constrict it orthogonal to the base, turning it into the height</li>
<li>press <code>d</code> to go into defining distance mode</li>
<li>click on the dotted line</li>
<li>type in the height</li>
<li>press <code>x</code> again to get back to normal lines.</li>
<li>complete the triangle</li>
</ol>

<p><a href="https://i.sstatic.net/lL1sb.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/lL1sb.png" alt="enter image description here"></a></p>

CC BY-SA 4.0
2020-04-12T14:05:42.323Z
2020-04-12T14:05:42.323Z
Trish
<p>When creating a sketch in Fusion 360, when drawing lines at an angle, it shows the length of the line:</p>

<p><a href="https://i.sstatic.net/q6kb4.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/q6kb4.png" alt="enter image description here"></a></p>

CC BY-SA 4.0
2020-04-12T11:07:08.330Z
The hand-drawn portion of your sketch shows the height, not the base. You currently do not have a defined base in the drawing. If one presumes to create a right triangle from the apex of the 13.9 mm line, you can use a construction line, which will provide a dimension, but still not the base. It appears you currently have a line for the base but not of the proper length.
fred_dot_u
CC BY-SA 4.0
2020-04-12T12:12:31.940Z
@fred_dot_u: I don't follow to be honest. I want the green length to be 10mm. I guess I can do it with a construction line, but is it possible without?
Pablo Fernandez
CC BY-SA 4.0
2020-04-12T18:58:33.220Z
Easy, place a point somewhere, press "d" for dimension and click point and than "your long base" and set it to `10`; now draw a line between the point and the end point of the base. But, that is pretty useless, you also need to know the distance from the Y-axis. Why not sketch a rectangle of 10 high? Then you can draw the triangle in it.
0scar
CC BY-SA 4.0
2020-04-14T15:43:33.480Z
So why do you want that value?  It's easily calculated since you know the line length and the angle.    You can calculate that value "offline" and then construct whatever other shape you want to add to the existing drawing.
Carl Witthoft
CC BY-SA 4.0
2020-04-16T07:32:29.617Z
@CarlWitthoft: I want to make the piece 5mm tall, with a 70 degree side of whatever length it is. So, calculating it is not what I'm after, but constraining it.
Pablo Fernandez
<fusion360>
Measuring the legs of the triangle instead of the hypotenuse in Fusion 360 sketch
Pablo Fernandez
# Measuring the legs of the triangle instead of the hypotenuse in Fusion 360 sketch

(Asked by: username_0 on 2020-04-12)

When creating a sketch in Fusion 360, when drawing lines at an angle, it shows the length of the line:

[![enter image description here](https://i.sstatic.net/q6kb4.png)](https://i.sstatic.net/q6kb4.png)

**Tags:** fusion360

> **Comments:**
> **username_1**: The hand-drawn portion of your sketch shows the height, not the base. You currently do not have a defined base in the drawing. If one presumes to create a right triangle from the apex of the 13.9 mm line, you can use a construction line, which will provide a dimension, but still not the base. It appears you currently have a line for the base but not of the proper length.  
> **username_0**: @username_1: I don't follow to be honest. I want the green length to be 10mm. I guess I can do it with a construction line, but is it possible without?  
> **username_2**: Easy, place a point somewhere, press "d" for dimension and click point and than "your long base" and set it to `10`; now draw a line between the point and the end point of the base. But, that is pretty useless, you also need to know the distance from the Y-axis. Why not sketch a rectangle of 10 high? Then you can draw the triangle in it.  
> **username_3**: So why do you want that value?  It's easily calculated since you know the line length and the angle.    You can calculate that value "offline" and then construct whatever other shape you want to add to the existing drawing.  
> **username_0**: @username_3: I want to make the piece 5mm tall, with a 70 degree side of whatever length it is. So, calculating it is not what I'm after, but constraining it.  

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## 1 answers

### Answer by username_4 on 2020-04-12. Score: 1

For this, use a construction line:

1. draw the approximate line
2. press `x` to go into the construction-line mode
3. pres `l` for the line tool
4. Draw a line from the end to the base
5. constrict it orthogonal to the base, turning it into the height
6. press `d` to go into defining distance mode
7. click on the dotted line
8. type in the height
9. press `x` again to get back to normal lines.
10. complete the triangle

[![enter image description here](https://i.sstatic.net/lL1sb.png)](https://i.sstatic.net/lL1sb.png)


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