How do i make a 3 point arc go at a right angle

Vzixae

I am currently trying to make rails. I am currently stuck and I do not know any way to make the arch a perfect 90 degrees. So does anyone have any tips to help me.

Domenico_DiMare

Hi @Vzixae

 It would help if you shared an Onshape document that you are working on or pictures of what you are trying to achieve.

mahir

If you mean you want the arc to be exactly a quarter of a circle, you can just constrain the endpoints to be horizontal/vertical to the center point.

nicholas_radzykewycz

If you need a quarter circle that is not aligned with horizontal or vertical you can use construction lines that are set to perpendicular and meet at the center point to make it 90 degrees as well. Though most cases fall into horizontal / vertical.

dirk_van_der_vaart

I think you need to use the Tangent command in sketch mode.

mahir

I always think it's funny when someone posts an exceptionally vague question and everyone on the forum goes through the exercise of trying to read their mind 

steve_shubin

In very similar manner, I’ve thought of it as being kind of like one of these game shows you see on TV

Were you try and guess what the person is trying to convey, with that OP saying as little as possible

And like you say @mahir , a number of us just jump right in whole-hog

It is funny