# BASIC GEOMETRY – ENGLISH – CHAPTER 4

BASIC GEOMETRY – ENGLISH – CHAPTER 4

BASIC GEOMETRY

CHAPTER 4 – PART 1

Quadrilaterals Convex and Concave

Perimeter of a Quadrilateral

Sum of the Interior Angles of Quadrilaterals

Sum of Exterior Angles of Quadrilaterals

Definition of a Square Quadrilateral

Calculation of Area of a Square Quadrilateral

Definition of Inscribed and Circumscribed Circumferences of a Square Quadrilateral

Definition of a Rectangle Quadrilateral

Area of a Rectangular Quadrilateral

BASIC GEOMETRY

CHAPTER 4 PART 2

Definition of Parallelograms

Area of a Quadrilateral Parallelogram

Definition of a Rhomboid Parallelogram

Area of a Rhomboid Parallelogram

Definition of the Scalene Trapezoid Quadrilateral

Definition of Isosceles Trapezoid Quadrilateral

BASIC GEOMETRY

CHAPTER 4 – PART 3

Area of Quadrilateral Trapezoid

Theorem of Equivalence of the Areas of a Triangle and a Parallelogram Constructed between Parallel Lines using the Same Base

Definition and Properties of the Golden Segment and Golden Rectangle

Definition of Golden Ratio or Golden Number

Construction of Golden Segment and Golden Rectangle

BASIC GEOMETRY

CHAPTER 4 – PART 3

13 Problems to be Solved