Place the 2 pieces, A and B, back to back with the A and B marks to the outside and the ends level.
Hold them so you are looking at the ends of the tails and pins.
Take the piece on the right or left, and open toward yourself, as if it was a door.
To fine tune Slider Controls click to select and use ◄► (cursor) keyboard keys.
Open new window containing only diagram images in current page ↓ This will better fit printed page. Printing to Scale Help
Your iPad, iPhone or Android Tablet or Phone is a valuable On-Site tool!
Lay your phone or tablet on an angled surface (roof ?) to directly measure angles and automatically calculate Roofing and Pitch Angle Apps.
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