x^2 + y^2<=R^2 and (x - d)^2 + y^2>=r^2

crescent

R>0 and r>0 and (d + r - R) (d - r + R) (-d + r + R)>0

(data not available)

A = r^2 cos^(-1)((-d^2 - r^2 + R^2)/(2 d r)) - R^2 cos^(-1)((d^2 - r^2 + R^2)/(2 d R)) + 1/2 sqrt((d + r - R) (d - r + R) (-d + r + R) (d + r + R))

(data not available)

p = 2 r cos^(-1)((d^2 + r^2 - R^2)/(2 d r)) + 2 R (π - cos^(-1)((d^2 - r^2 + R^2)/(2 d R)))

(data not available)

(data not available)

concave laminae | curvilinear laminae