diff --git a/lesson_3/Debug/lesson_3 b/lesson_3/Debug/lesson_3
new file mode 100755
index 0000000..85c73ed
Binary files /dev/null and b/lesson_3/Debug/lesson_3 differ
diff --git a/lesson_3/Debug/main.d b/lesson_3/Debug/main.d
new file mode 100644
index 0000000..32d5ad1
--- /dev/null
+++ b/lesson_3/Debug/main.d
@@ -0,0 +1,6 @@
+main.o: ../main.cpp ../exercise_1.hpp ../exercise_2.hpp ../exercise_3.hpp \
+ ../exercise_4.hpp
+../exercise_1.hpp:
+../exercise_2.hpp:
+../exercise_3.hpp:
+../exercise_4.hpp:
diff --git a/lesson_3/Debug/main.o b/lesson_3/Debug/main.o
new file mode 100644
index 0000000..877cfb0
Binary files /dev/null and b/lesson_3/Debug/main.o differ
diff --git a/lesson_3/Debug/makefile b/lesson_3/Debug/makefile
new file mode 100644
index 0000000..4ee7c15
--- /dev/null
+++ b/lesson_3/Debug/makefile
@@ -0,0 +1,57 @@
+################################################################################
+# Automatically-generated file. Do not edit!
+################################################################################
+
+-include ../makefile.init
+
+RM := rm -rf
+
+# All of the sources participating in the build are defined here
+-include sources.mk
+-include subdir.mk
+-include objects.mk
+
+ifneq ($(MAKECMDGOALS),clean)
+ifneq ($(strip $(CC_DEPS)),)
+-include $(CC_DEPS)
+endif
+ifneq ($(strip $(C++_DEPS)),)
+-include $(C++_DEPS)
+endif
+ifneq ($(strip $(C_UPPER_DEPS)),)
+-include $(C_UPPER_DEPS)
+endif
+ifneq ($(strip $(CXX_DEPS)),)
+-include $(CXX_DEPS)
+endif
+ifneq ($(strip $(CPP_DEPS)),)
+-include $(CPP_DEPS)
+endif
+ifneq ($(strip $(C_DEPS)),)
+-include $(C_DEPS)
+endif
+endif
+
+-include ../makefile.defs
+
+# Add inputs and outputs from these tool invocations to the build variables 
+
+# All Target
+all: lesson_3
+
+# Tool invocations
+lesson_3: $(OBJS) $(USER_OBJS)
+	@echo 'Building target: $@'
+	@echo 'Invoking: GCC C++ Linker'
+	g++  -o "lesson_3" $(OBJS) $(USER_OBJS) $(LIBS)
+	@echo 'Finished building target: $@'
+	@echo ' '
+
+# Other Targets
+clean:
+	-$(RM) $(CC_DEPS)$(C++_DEPS)$(EXECUTABLES)$(C_UPPER_DEPS)$(CXX_DEPS)$(OBJS)$(CPP_DEPS)$(C_DEPS) lesson_3
+	-@echo ' '
+
+.PHONY: all clean dependents
+
+-include ../makefile.targets
diff --git a/lesson_3/Debug/objects.mk b/lesson_3/Debug/objects.mk
new file mode 100644
index 0000000..742c2da
--- /dev/null
+++ b/lesson_3/Debug/objects.mk
@@ -0,0 +1,8 @@
+################################################################################
+# Automatically-generated file. Do not edit!
+################################################################################
+
+USER_OBJS :=
+
+LIBS :=
+
diff --git a/lesson_3/Debug/sources.mk b/lesson_3/Debug/sources.mk
new file mode 100644
index 0000000..a7f166f
--- /dev/null
+++ b/lesson_3/Debug/sources.mk
@@ -0,0 +1,27 @@
+################################################################################
+# Automatically-generated file. Do not edit!
+################################################################################
+
+C_UPPER_SRCS := 
+CXX_SRCS := 
+C++_SRCS := 
+OBJ_SRCS := 
+CC_SRCS := 
+ASM_SRCS := 
+CPP_SRCS := 
+C_SRCS := 
+O_SRCS := 
+S_UPPER_SRCS := 
+CC_DEPS := 
+C++_DEPS := 
+EXECUTABLES := 
+C_UPPER_DEPS := 
+CXX_DEPS := 
+OBJS := 
+CPP_DEPS := 
+C_DEPS := 
+
+# Every subdirectory with source files must be described here
+SUBDIRS := \
+. \
+
diff --git a/lesson_3/Debug/subdir.mk b/lesson_3/Debug/subdir.mk
new file mode 100644
index 0000000..c456c4a
--- /dev/null
+++ b/lesson_3/Debug/subdir.mk
@@ -0,0 +1,24 @@
+################################################################################
+# Automatically-generated file. Do not edit!
+################################################################################
+
+# Add inputs and outputs from these tool invocations to the build variables 
+CPP_SRCS += \
+../main.cpp 
+
+OBJS += \
+./main.o 
+
+CPP_DEPS += \
+./main.d 
+
+
+# Each subdirectory must supply rules for building sources it contributes
+%.o: ../%.cpp
+	@echo 'Building file: $<'
+	@echo 'Invoking: GCC C++ Compiler'
+	g++ -O0 -g3 -Wall -c -fmessage-length=0 -MMD -MP -MF"$(@:%.o=%.d)" -MT"$(@)" -o "$@" "$<"
+	@echo 'Finished building: $<'
+	@echo ' '
+
+
diff --git a/lesson_3/exercise_1.hpp b/lesson_3/exercise_1.hpp
new file mode 100644
index 0000000..252dd91
--- /dev/null
+++ b/lesson_3/exercise_1.hpp
@@ -0,0 +1,106 @@
+/*
+ * Для расчет площади фигур квадрат/ромб/прямоугольник/параллелограмм
+ * справедлива будет одна общая формула - произведение основания на высоту
+ */
+
+#ifndef EXERCISE_1_HPP_
+#define EXERCISE_1_HPP_
+
+#include <math.h>
+
+#define PI 3.14159265358979323846
+
+float getRadian(float degree)
+{
+	return PI / 180 * degree;
+}
+
+class Figure
+{
+public:
+	virtual float area() = 0;
+	virtual ~Figure() = 0;
+};
+
+class Parallelogram : public Figure
+{
+private:
+	float m_side_a;
+	float m_side_b;
+	float m_height;
+protected:
+	float getSideA() const
+	{
+		return m_side_a;
+	}
+
+	float getSideB() const
+	{
+		return m_side_b;
+	}
+public:
+	Parallelogram(float side_a, float height, float side_b = 0.0)
+	: m_side_a(side_a), m_side_b(side_b), m_height(height) { }
+
+	float area()
+	{
+		float area = m_side_a * m_height;
+
+		std::cout << "Площадь параллелограмма равна " << area << std::endl;
+
+		return area;
+	}
+};
+
+class Circle : public Figure
+{
+
+};
+
+class Rectangle : public Parallelogram
+{
+public:
+	Rectangle(float side_a, float side_b)
+	: Parallelogram(side_a, side_b, side_b) { }
+
+	float area()
+	{
+		float area = getSideA() * getSideB();
+
+		std::cout << "Площадь прямоугольника равна " << area << std::endl;
+
+		return area;
+	}
+};
+
+class Square : public Parallelogram
+{
+	Square(float side_a, float side_b)
+	: Parallelogram(side_a, side_b, side_b) { }
+
+	float area()
+	{
+		float area = getSideA() * getSideB();
+
+		std::cout << "Площадь квадрата равна " << area << std::endl;
+
+		return area;
+	}
+};
+
+class Rhombus : public Parallelogram
+{
+	Rhombus(float side_a, float side_b)
+	: Parallelogram(side_a, side_b, side_b) { }
+
+	float area()
+	{
+		float area = getSideA() * getSideB();
+
+		std::cout << "Площадь ромба равна " << area << std::endl;
+
+		return area;
+	}
+};
+
+#endif
diff --git a/lesson_3/exercise_2.hpp b/lesson_3/exercise_2.hpp
new file mode 100644
index 0000000..5c99457
--- /dev/null
+++ b/lesson_3/exercise_2.hpp
@@ -0,0 +1,8 @@
+#ifndef EXERCISE_2_HPP_
+#define EXERCISE_2_HPP_
+
+
+
+
+
+#endif
diff --git a/lesson_3/exercise_3.hpp b/lesson_3/exercise_3.hpp
new file mode 100644
index 0000000..d12de41
--- /dev/null
+++ b/lesson_3/exercise_3.hpp
@@ -0,0 +1,8 @@
+#ifndef EXERCISE_3_HPP_
+#define EXERCISE_3_HPP_
+
+
+
+
+
+#endif
diff --git a/lesson_3/exercise_4.hpp b/lesson_3/exercise_4.hpp
new file mode 100644
index 0000000..ade8be2
--- /dev/null
+++ b/lesson_3/exercise_4.hpp
@@ -0,0 +1,8 @@
+#ifndef EXERCISE_4_HPP_
+#define EXERCISE_4_HPP_
+
+
+
+
+
+#endif
diff --git a/lesson_3/main.cpp b/lesson_3/main.cpp
new file mode 100644
index 0000000..a3019d9
--- /dev/null
+++ b/lesson_3/main.cpp
@@ -0,0 +1,12 @@
+#include <iostream>
+#include "exercise_1.hpp"
+#include "exercise_2.hpp"
+#include "exercise_3.hpp"
+#include "exercise_4.hpp"
+
+using namespace std;
+
+int main()
+{
+
+}