In a recent paper, Ohta & Townsend studied the conditions which must b
e satisfied for a configuration of two intersecting M5-branes at angle
s to be supersymmetric. In this paper we extend this result to any num
ber of M5-branes or any number of M2-branes. This is accomplished by i
nterpreting their results in terms of calibrated geometry, which is of
independent interest.