dois espelhos plantas tem uma de suas arestas coincidentes, formando um ângulo desconhecido, de tal modo que ficam perpendiculares ao plano horizontal. ao colocarmos 2 objetos entre os dois espelhos observarmos um total de 8 imagens formadas. qual é, em graus, a medida do ângulo formado entre os dois espelhos?

Two students, each riding bicycles, start from the same apartment building and ride to the same building on campus, but each takes a different route. the first student rides 1100 m due east and then turns due north and travels another 1430 m before arriving at the destination. the second student heads due north for 1930 m and then turns and heads directly toward the destination.at the turning point, how far is the second student from the destination?