Question

Find the measure arc sag if mL STQ=72 and
MLPSR=38
P
S
38
DI​

Answer 1

Answer:

A related formula can be used to calculate the height of the arch at any point - not just in the center. This formula can be used by those that want to build a dish by routing out a board to different depths for example. The first step is to calculate the sagitta s for the arc based on the radius r and the span l. Use the first calculator (above) to do this. Then you can plug the values for r and s into the following formula to calculate height h at any offset x from the center of the arc.