@startuml
left to right direction
"Admin" as Admin
actor "Player" as pl
rectangle Maths'Educ {
  usecase "Répondre aux questions" as UC1
  usecase "Créer un compte" as UC2
  usecase "Consulter ses scores" as UC3
  usecase "//Consulter//" as UC4
  usecase "Choisir une série de questions" as UC5
  usecase "S'authentifier" as UC6
  usecase "//Ajouter//" as UC7
  usecase "//Modifier//" as UC8
  usecase "//Supprimer//" as UC9
  usecase "Chapitres" as UC10
  usecase "Questions/Réponses" as UC11
  usecase "Administrateurs" as UC12
}
Admin-->UC4
pl --> UC1
pl --> UC2
pl --> UC3
UC1 --> UC5 #line.dashed : include 
UC6-->UC2 #line.dashed : extend
UC3-->UC6 #line.dashed : include
UC4-->UC7 #line.dashed : extend
UC4-->UC8 #line.dashed : extend
UC4-->UC9 #line.dashed : extend
UC7<|--UC10
UC8<|--UC10
UC9<|--UC10
UC7<|--UC11
UC8<|--UC11
UC9<|--UC11
UC7<|--UC12
UC8<|--UC12
UC9<|--UC12
UC4<|--UC10
UC4<|--UC11
UC4<|--UC12
@enduml