fd79dca7-cb7c-454e-b7a4-9225ae5ba553744c71f5-5ffb-480e-945c-63c688cdc3172.7.2.4.7[{"lang":"es","name":"Ángulo entre dos planos y entre recta-plano"},{"lang":"en","name":"Angle between two planes and between a straight line and a plane"},{"lang":"ca","name":"Angle entre dos plans i entre recta i pla"}]77/18/16, 11:43 AM7/18/16, 11:43 AM