Please help in creating this arc

[subform]

Hello everyone. I tried for few hours to create this vaulted ceiling arcs, but I'm having issues with the transition from a curve into a point.

Can some one please help me with this one?

[Rich O Brien]

I think your top arc needs to be pointed.

So you get the noticeable transitition.

Pic isn't great though to decipher transition

[subform]

Thank you for the reply. Yeah, the intersecting point should be a sharp point, but the beginning should be an arc. I tried a few solutions but didn't end up with a good result.