What you need to know
Both edges are quarter-circle arcs, so each turns through 90 degrees. A quarter-circle arc has length L = pi x r / 2. Rearrange this to r = 2L / pi.
Tip 1
Use 942.48 mm for the inside arc and 1,884.96 mm for the outside arc.
Tip 2
Multiply each arc length by 2, then divide by pi.
How to solve it
Inside radius = (2 x 942.48) / pi = 600 mm.
Outside radius = (2 x 1,884.96) / pi = 1,200 mm.
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Inside radius = 600 mm
Outside radius = 1,200 mm
