Length of the line considered in case of determining scale of tilted photograph can be determined by ____________

(L = sqrt{(X_a+X_b)^2*(Y_a+Y_b)^2} )

(L = sqrt{(X_a+X_b)^2/(Y_a+Y_b)^2} )

(L = sqrt{(X_a+X_b)^2+(Y_a+Y_b)^2} )

(L = sqrt{(X_a+X_b)^2*(Y_a+Y_b)^2} )

(L = sqrt{(X_a+X_b)^2-(Y_a+Y_b)^2} )

Length of the line considered in case of determining scale of tilted p

1.	Length of the line considered in case of determining scale of tilted photograph can be determined by ____________
A.	(L = sqrt{(X_a+X_b)^2/(Y_a+Y_b)^2} )
B.	(L = sqrt{(X_a+X_b)^2+(Y_a+Y_b)^2} )
C.	(L = sqrt{(X_a+X_b)^2*(Y_a+Y_b)^2} )
D.	(L = sqrt{(X_a+X_b)^2-(Y_a+Y_b)^2} )
Answer» C. (L = sqrt{(X_a+X_b)^2*(Y_a+Y_b)^2} )