diff --git a/Md03_Dev_Back_end/Bloco26/26.2/conteudo001.ts b/Md03_Dev_Back_end/Bloco26/26.2/conteudo001.ts
new file mode 100644
index 00000000..a926f95e
--- /dev/null
+++ b/Md03_Dev_Back_end/Bloco26/26.2/conteudo001.ts
@@ -0,0 +1,70 @@
+class Animal {
+  constructor(public name: string, private _birthDate: Date) {}
+
+  get age() {
+    const timeDiff = Math.abs(
+      Date.now() - 
+      new Date(this._birthDate).getTime()
+    );
+
+    return Math.floor(timeDiff / (1000 * 3600 * 24) / 365.25);
+  }
+}
+
+class Mammal extends Animal {
+  walk() {
+    console.log(`${this.name} está andando`);
+  }
+}
+
+class Bird extends Animal {
+  fly() {
+    console.log(`${this.name} está voando!`)
+  }
+}
+
+const tigger = new Mammal('tigre', new Date(Date.parse('May 03, 2020')));
+const parrot = new Bird('Papagaio', new Date(Date.parse('Jun 07, 2017')));
+
+const main = (animal: Animal) => {
+  console.log(animal.age);
+}
+
+main(tigger);
+tigger.walk();
+console.log(parrot.age);
+parrot.fly();
+
+class Superclass {
+  constructor(public isSuper: boolean = true) {}
+
+  protected sayHello() {
+    console.log('Olá Mundo!');
+  }
+}
+
+class Subclass extends Superclass {
+  constructor() {
+    super(false);
+  }
+
+  sayHello2() {
+    this.sayHello();
+  }
+}
+
+function myFunction(objClass: Subclass) {
+  objClass.sayHello2();
+}
+
+function mySuperFunction(objClass: Superclass) {
+  (objClass.isSuper) ? console.log('super') : console.log('sub');
+}
+
+const objSubClass = new Subclass();
+const objSupreClass = new Superclass();
+
+myFunction(objSubClass);
+// myFunction(objSupreClass);
+mySuperFunction(objSubClass);
+mySuperFunction(objSupreClass);
\ No newline at end of file
diff --git a/Md03_Dev_Back_end/Bloco26/26.2/conteudoPt2.ts b/Md03_Dev_Back_end/Bloco26/26.2/conteudoPt2.ts
new file mode 100644
index 00000000..2e105fbf
--- /dev/null
+++ b/Md03_Dev_Back_end/Bloco26/26.2/conteudoPt2.ts
@@ -0,0 +1,29 @@
+interface Animal {
+  name: string;
+  age: number;
+
+  getBirthDate(): Date;
+}
+
+class Birds implements Animal {
+  constructor(public name: string, private birthDate: Date) {}
+
+  get age() {
+    var timeDiff = Math.abs(Date.now() - new Date(this.birthDate).getTime());
+
+    return Math.floor(timeDiff / (1000 * 3600 * 24) / 365.25);
+  }
+
+  getBirthDate(): Date {
+    return this.birthDate;
+  }
+
+  fly() {
+    console.log(`${this.name} está voando!`);
+  }
+}
+
+export const parrot = new Birds('Papagaio',new Date(Date.parse('Aug 16, 2015')));
+
+console.log(parrot.age);
+parrot.fly();
\ No newline at end of file
diff --git a/Md03_Dev_Back_end/Bloco26/26.2/fixarConteudo.ts b/Md03_Dev_Back_end/Bloco26/26.2/fixarConteudo.ts
new file mode 100644
index 00000000..c6898c0e
--- /dev/null
+++ b/Md03_Dev_Back_end/Bloco26/26.2/fixarConteudo.ts
@@ -0,0 +1,17 @@
+interface MyInterface {
+  myNumber: number;
+
+  myFunc(myParam: number): string;
+}
+
+class MyClass implements MyInterface {
+  constructor(public myNumber: number) {}
+
+  myFunc(num: number) {
+    return `${num + this.myNumber}`;
+  } 
+}
+
+const numero = new MyClass(3);
+
+console.log(numero.myFunc(2));
\ No newline at end of file