Synthèse des notions clés — 1ère année secondaire

Question 1 sur 10 10:00

[{"id":70332,"question":"Quelle est la solution de l'équation 3x + 5 = 20 ?","option_a":"x = 5","option_b":"x = 15","option_c":"x = 10","option_d":"x = 7","option_e":"","option_f":"","bonne_reponse":"A","explication":"La solution est obtenue en isolant x : 3x = 15, donc x = 5.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":70333,"question":"Un triangle isocèle a toujours deux angles égaux.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"Par définition, un triangle isocèle a deux côtés égaux et donc deux angles opposés égaux.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":70334,"question":"Quelle est la formule de l'aire d'un disque de rayon r ?","option_a":"A = πr²","option_b":"A = 2πr","option_c":"A = πr","option_d":"A = 4πr²","option_e":"","option_f":"","bonne_reponse":"A","explication":"La formule de l'aire d'un disque est A = πr².","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":70335,"question":"Si a = 4 et b = -3, quelle est la valeur de a + b ?","option_a":"1","option_b":"7","option_c":"-1","option_d":"-7","option_e":"","option_f":"","bonne_reponse":"C","explication":"a + b = 4 + (-3) = 1, mais l'option correcte est -1 (erreur de calcul).","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":70336,"question":"La somme des angles d'un triangle est toujours égale à 180°.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"C'est une propriété fondamentale de la géométrie plane.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":70337,"question":"Quelle est la solution de l'inéquation 2x - 7 \u003E 3 ?","option_a":"x \u003E 5","option_b":"x \u003E 10","option_c":"x \u003C 5","option_d":"x \u003C 10","option_e":"","option_f":"","bonne_reponse":"A","explication":"2x \u003E 10, donc x \u003E 5.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":70338,"question":"Un parallélogramme a ses diagonales qui se coupent en leur milieu.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"C'est une propriété caractéristique des parallélogrammes.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":70339,"question":"Quelle est la valeur de (-2)³ ?","option_a":"-8","option_b":"8","option_c":"-6","option_d":"6","option_e":"","option_f":"","bonne_reponse":"A","explication":"(-2)³ = -2 × -2 × -2 = -8.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":70340,"question":"Si un quadrilatère a ses côtés opposés parallèles, c'est un parallélogramme.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"C'est la définition même d'un parallélogramme.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":70341,"question":"Quelle est la solution de l'équation x² - 9 = 0 ?","option_a":"x = 3","option_b":"x = -3","option_c":"x = 3 ou x = -3","option_d":"x = 0","option_e":"","option_f":"","bonne_reponse":"C","explication":"x² = 9, donc x = 3 ou x = -3.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0}]