## Field measuring question

## Field measuring question

(OP)

Hello,

I do a lot of field measuring for a company and on this newest job I've been measuring a lot of area outside of radii. Picture a 90 degree triangle with one edge curved into the triangle. I've been figuring out the radius of the circle and subtracting that from the triangle area. Is there an easier way to measure this to get a fast area? It does not have to be 100% exact.

Thanks

I do a lot of field measuring for a company and on this newest job I've been measuring a lot of area outside of radii. Picture a 90 degree triangle with one edge curved into the triangle. I've been figuring out the radius of the circle and subtracting that from the triangle area. Is there an easier way to measure this to get a fast area? It does not have to be 100% exact.

Thanks

## RE: Field measuring question

A cheesy solution would be to treat the missing area as a triangle

TTFN

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## RE: Field measuring question

## RE: Field measuring question

TTFN

FAQ731-376: Eng-Tips.com Forum Policies

## RE: Field measuring question

If radius is know, use a formula for a segment and subtract from triangle (this may be what you are doing..)

For central angle in degrees

A=R^2/2(CxPI/180 -sinC)

where:

C is the central angle in DEGREES

R is the radius of the circle of which the segment is a part.

sin is the trigonometry Sine function.

## RE: Field measuring question

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## RE: Field measuring question