How can I boolean subtract a circle outline from a shape in Sketch?

Question

This is the result I'm getting when trying to subtract the black circle from the red triangle. What I want is for the inside of the circle to be left.

I have outlined the circle, which in reality just makes a compound shape made of two circles.

I'm using Sketch 3.7.2

Answer 1

This is done in Illustrator but can be applied to Sketch.

Create a triangle and then duplicate.

Create a circle to cut out the outer edge.

Create another circle to clip the inner shape.

You should have 4 shapes now.

Select the big circle and 1 of the triangles and use Boolean Operations -> Subtract.

Select the small circle and the other triangle and use the Boolean Operations -> Intersect

Result

Answer 2

You can do it by selecting your circle, then go to layer > convert to outlines (cmd + shift + o); Then you can substract the circle from the triangle :

• select the circle and the triangle
• click substract (top right of the screen)
• in the layers, open the combined shapes
• click on the first circle and click union (top right)

https://infinit.io/_/3hSQmTb

It should do the job.