  The different appearances exhibited by coronal mass ejections (CMEs) are
believed to be in part the result of different orientations of their main axis
of symmetry, consistent with a flux-rope configuration. There are observational
reports of CMEs seen along their main axis (axial perspective) and
perpendicular to it (lateral perspective), but no simultaneous observations of
both perspectives from the same CME have been reported to date. The
stereoscopic views of the telescopes onboard the $Solar$-$Terrestrial$
$Relations$ $Observatory$ (STEREO) twin spacecraft, in combination with the
views from the $Solar$ $and$ $Heliospheric$ $Observatory$ (SOHO) and the
$Solar$ $Dynamics$ $Observatory$ (SDO), allow us to study the axial and lateral
perspectives of a CME simultaneously for the first time. In addition, this
study shows that the lateral angular extent ($L$) increases linearly with time,
while the angular extent of the axial perspective ($D$) presents this behavior
only from the low corona to $\approx\,$5 $R_{\odot}$, where it slows down. The
ratio $L/D \approx\,$1.6 obtained here as the average over several points in
time is consistent with measurements of $L$ and $D$ previously performed on
events exhibiting only one of the perspectives from the single vantage point
provided by SOHO.
