Quiz — 6.3Dtransforms.ppt

Question 1 sur 10 20:00

[{"id":75305,"question":"Quelle transformation conserve les distances et les angles ?","option_a":"Homothétie","option_b":"Isométrie","option_c":"Projection","option_d":"Réflexion","option_e":"","option_f":"","bonne_reponse":"b","explication":"Une isométrie est une transformation qui conserve les distances et les angles, contrairement aux autres options.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"Homothétie\", \"b\": \"Isométrie\", \"c\": \"Projection\", \"d\": \"Réflex","_debug_options_count":4},{"id":75306,"question":"Une homothétie de rapport 2 agrandit-elle ou réduit-elle une figure ?","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"Une homothétie de rapport 2 agrandit la figure car |2| \u003E 1. Si le rapport est entre -1 et 1 (exclu), la figure est réduite.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"Vrai\", \"b\": \"Faux\", \"c\": \"\", \"d\": \"\"}}","_debug_options_count":4},{"id":75307,"question":"Quelle est l'image d'un point A(3, 4) par une translation de vecteur (2, -1) ?","option_a":"A'(5, 3)","option_b":"A'(1, 5)","option_c":"A'(5, 5)","option_d":"A'(1, 3)","option_e":"","option_f":"","bonne_reponse":"a","explication":"L'image d'un point (x, y) par une translation de vecteur (a, b) est (x+a, y+b). Ici, (3+2, 4-1) = (5, 3).","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"A'(5, 3)\", \"b\": \"A'(1, 5)\", \"c\": \"A'(5, 5)\", \"d\": \"A'(1, 3)\"}}","_debug_options_count":4},{"id":75308,"question":"Une symétrie centrale est-elle une isométrie ?","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"Une symétrie centrale conserve les distances et les angles, donc c'est une isométrie.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"Vrai\", \"b\": \"Faux\", \"c\": \"\", \"d\": \"\"}}","_debug_options_count":4},{"id":75309,"question":"Quel est le rapport d'une homothétie qui réduit une figure de moitié ?","option_a":"2","option_b":"-2","option_c":"0.5","option_d":"-0.5","option_e":"","option_f":"","bonne_reponse":"c","explication":"Un rapport de 0.5 réduit la figure de moitié. Le signe négatif indique une inversion de sens.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"c\", \"options\": {\"a\": \"2\", \"b\": \"-2\", \"c\": \"0.5\", \"d\": \"-0.5\"}}","_debug_options_count":4},{"id":75310,"question":"Quelle transformation fait tourner une figure autour d'un point fixe ?","option_a":"Translation","option_b":"Rotation","option_c":"Homothétie","option_d":"Symétrie axiale","option_e":"","option_f":"","bonne_reponse":"b","explication":"Une rotation fait tourner une figure autour d'un point fixe appelé centre de rotation.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"Translation\", \"b\": \"Rotation\", \"c\": \"Homothétie\", \"d\": \"Symétri","_debug_options_count":4},{"id":75311,"question":"L'image d'un segment [AB] par une symétrie axiale est-elle parallèle à [AB] ?","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"b","explication":"L'image d'un segment par une symétrie axiale est un segment parallèle à l'original, mais de sens opposé.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"Vrai\", \"b\": \"Faux\", \"c\": \"\", \"d\": \"\"}}","_debug_options_count":4},{"id":75312,"question":"Quelle est la nature de la transformation qui associe à tout point M son image M' telle que MM' = 2MA ?","option_a":"Translation","option_b":"Homothétie de rapport 2","option_c":"Rotation","option_d":"Symétrie centrale","option_e":"","option_f":"","bonne_reponse":"b","explication":"Cette transformation est une homothétie de rapport 2 centrée en A, car MM' = 2MA.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"Translation\", \"b\": \"Homothétie de rapport 2\", \"c\": \"Rotation\", \"","_debug_options_count":4},{"id":75313,"question":"Une homothétie de rapport -1 est-elle équivalente à une symétrie centrale ?","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"Une homothétie de rapport -1 est équivalente à une symétrie centrale, car elle inverse les distances et les angles.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"Vrai\", \"b\": \"Faux\", \"c\": \"\", \"d\": \"\"}}","_debug_options_count":4},{"id":75314,"question":"Quelle transformation conserve les angles mais pas nécessairement les distances ?","option_a":"Isométrie","option_b":"Homothétie","option_c":"Projection","option_d":"Translation","option_e":"","option_f":"","bonne_reponse":"b","explication":"Une homothétie conserve les angles mais modifie les distances selon le rapport donné.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"Isométrie\", \"b\": \"Homothétie\", \"c\": \"Projection\", \"d\": \"Transla","_debug_options_count":4}]