Quiz interactif : Mathématiques 8ème année — Algèbre et Géométrie

Question 1 sur 10 10:00

[{"id":48601,"question":"Quel est le résultat de l'opération (-5) + (+3) ?","option_a":"-8","option_b":"-2","option_c":"2","option_d":"8","option_e":"","option_f":"","bonne_reponse":"B","explication":"La somme de -5 et +3 donne -2, car on recule de 5 unités sur la droite numérique puis on avance de 3 unités.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":48602,"question":"Un triangle isocèle a deux angles égaux à 70°. Quelle est la mesure du troisième angle ?","option_a":"40°","option_b":"50°","option_c":"60°","option_d":"70°","option_e":"","option_f":"","bonne_reponse":"A","explication":"La somme des angles d'un triangle est 180°. Donc 180° - (70° + 70°) = 40°.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":48603,"question":"Vrai ou Faux : 3x + 5 = 20 est une équation du premier degré.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"C'est une équation du premier degré car l'inconnue x est à la puissance 1.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":48604,"question":"Quelle est la formule de l'aire d'un rectangle de longueur L et de largeur l ?","option_a":"L + l","option_b":"2(L + l)","option_c":"L × l","option_d":"L² + l²","option_e":"","option_f":"","bonne_reponse":"C","explication":"L'aire d'un rectangle se calcule en multipliant sa longueur par sa largeur : A = L × l.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":48605,"question":"Vrai ou Faux : 15% de 200 est égal à 30.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"15% de 200 = (15\/100) × 200 = 30. L'affirmation est donc vraie.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":48606,"question":"Résoudre l'équation : 2x - 7 = 11","option_a":"x = 9","option_b":"x = 4","option_c":"x = 18","option_d":"x = 2","option_e":"","option_f":"","bonne_reponse":"A","explication":"2x = 11 + 7 → 2x = 18 → x = 9.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":48607,"question":"Quelle est la nature d'un quadrilatère ayant deux côtés parallèles et deux côtés non parallèles ?","option_a":"Carré","option_b":"Rectangle","option_c":"Trapèze","option_d":"Losange","option_e":"","option_f":"","bonne_reponse":"C","explication":"Un quadrilatère avec deux côtés parallèles est un trapèze.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":48608,"question":"Vrai ou Faux : Le périmètre d'un cercle se calcule avec la formule P = π × r.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"B","explication":"Le périmètre d'un cercle est P = 2πr (ou P = πd, avec d le diamètre).","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":48609,"question":"Quel est le résultat de 0,75 × 4 ?","option_a":"0,3","option_b":"3","option_c":"30","option_d":"0,03","option_e":"","option_f":"","bonne_reponse":"B","explication":"0,75 × 4 = 3, car 0,75 est égal à 3\/4 et 3\/4 × 4 = 3.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":48610,"question":"Quelle est la valeur de x dans l'inéquation : 3x + 2 ≤ 14 ?","option_a":"x ≤ 4","option_b":"x ≥ 4","option_c":"x ≤ 12","option_d":"x ≤ 16","option_e":"","option_f":"","bonne_reponse":"A","explication":"3x ≤ 12 → x ≤ 4.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0}]