![1boy 1girl 4koma >:( >_< ahoge azur_lane baldi baldi's_basics_in_education_and_learning bangs bare_shoulders blue_eyes book breasts cleavage comic commentary detached_sleeves evolution eyebrows_visible_through_hair frown happy highres holding holding_pen holding_stick idea korean_text long_hair march_of_progress math mechanical_pencil musical_note necktie open_mouth partially_translated paw_print pen pencil raised_eyebrows red_hair red_neckwear san_diego_(azur_lane) smile stick swept_bangs the_thinker tie_clip translation_request twintails upper_body vitruvian_man winterfall_(artenh) rating:s score:13 1boy 1girl 4koma >:( >_< ahoge azur_lane baldi baldi's_basics_in_education_and_learning bangs bare_shoulders blue_eyes book breasts cleavage comic commentary detached_sleeves evolution eyebrows_visible_through_hair frown happy highres holding holding_pen holding_stick idea korean_text long_hair march_of_progress math mechanical_pencil musical_note necktie open_mouth partially_translated paw_print pen pencil raised_eyebrows red_hair red_neckwear san_diego_(azur_lane) smile stick swept_bangs the_thinker tie_clip translation_request twintails upper_body vitruvian_man winterfall_(artenh)](/cdn_image/preview/af/44/af44487433e483e141960e391b5961e2.jpg)
vitruvian man
A drawing by Leonardo da Vinci, which often referred as "Canon of Proportions".
The drawing is based on the correlations of ideal human proportions with geometry described by the ancient Roman architect Vitruvius in Book III of his treatise De Architectura. -Wikipedia-