СУММА ВЕКТОРОВ правило треугольника

all topics on geometry - https://vuroki.ru/geometriya_9_klass GEOMETRY 9th grade ALL TOPICS -    • Геометрия 9 класс ВСЕ ТЕМЫ Атанасян   SOLUTION of problems and EXAMPLES - https://vk.com/club49102005 This video lesson on geometry for grade 9 explains two ways of adding vectors: adding vectors according to the triangle rule adding vectors according to the parallelogram rule adding a set of vectors proved: commutative law of adding vectors associative law of adding vectors solves problems from the textbook Atanasian 762 to find the modulus of the sum of two vectors. #vector #geometry #Atanasian #Romanov