obtuse angle on mitre cut

[cult]

Refreshing up on my obtuses. The last time i cut some obtuse angles was in 2008ish.

For an example, If i have an angle of 142d and i want to split down the middle for my skirting board and cornice. I get an angle of 71d, i then take away 71 from 90 which leave me with a cut of 19d on the mitre. When i cut the 2 cuts at 19d, they will meet and close the joint percise. When im cutting my cornice for an inside cut, if i cut the 19d, it wont be split in the middle!

Another method i used to use was get a compass, find my angle with the bevel at 142d, mark it on scrap piece of paper. Use the compass on 3 points to find the center. Once the center is found, mark it and cut a scrap piece of timber then set the mitre to this angle.

Would the second method be best for both cuts.

 

[Amysongbird]

Refreshing up on my obtuses. The last time i cut some obtuse angles was in 2008ish.

For an example, If i have an angle of 142d and i want to split down the middle for my skirting board and cornice. I get an angle of 71d, i then take away 71 from 90 which leave me with a cut of 19d on the mitre. When i cut the 2 cuts at 19d, they will meet and close the joint percise. When im cutting my cornice for an inside cut, if i cut the 19d, it wont be split in the middle!

Another method i used to use was get a compass, find my angle with the bevel at 142d, mark it on scrap piece of paper. Use the compass on 3 points to find the center. Once the center is found, mark it and cut a scrap piece of timber then set the mitre to this angle.

Would the second method be best for both cuts.

Thank you, thank you, THANK YOU! Finally, an explanation I completely understand! Just done my first proper obtuse angle (I’m a brand new DIY girl). Hooray!!

 

[Essex Barn Workshop]

Thank you, thank you, THANK YOU! Finally, an explanation I completely understand! Just done my first proper obtuse angle (I’m a brand new DIY girl). Hooray!!

Have a look at the video in this thread I posted a couple of days ago, explains obtuse and acute cutting really well:
https://www.ukworkshop.co.uk/threads/cutting-an-acute-angle-on-a-mitre-saw-less-than-45.138341/