Tadasana, Mountain pose or Samasthiti is a standing asana in modern yoga as exercise; it is not described in medieval hatha yoga texts. It is the basis for several other standing asanas.
Variations include the side bend Indudalasana, one of the asanas sometimes called Half Moon Pose.
Standing in a back bend gives the Standing Locust Pose, Stiti Shalabhasana.
Ardha Chandrasana Yoga Asana Nina Mel
Utthita Parshvakonasana, Extended Side Angle Pose, is an asana in modern yoga as exercise. It is first described in 20th century texts.
Utthita Parshvakonasana variant with arm in front of leg
Parivritta Parshvakonasana