The book entitled "Teaching of Geometrical Angles by Use of Diagrams in Life Span" is covering the concepts of geometrical angles, types and their significance in life. This book is written to make clear concepts of geometrical angles through diagrams and different examples of daily routine explore the existence of angles. This book is very helpful for students to learn geometrical angles because it is quite difficult to understand for them. First chapter includes the complete introduction of plane geometry, geometrical angle, its types and angle pairs with detail. Second chapter includes solid geometry, circle and polygons. It also covers types of polygon and explain how sum of interior and exterior angles make a complete circle of 360 degrees. Third chapter belongs to the significance of angles in chemistry to make valuable existence of element, molecules and their structure. Fourth and Fifth chapter explains that every action around us, in our life, is happening at some angle.The possibility of any work done varies according to angle and many natural phenomena of life happens at the cost of geometrical angles. Last chapter includes the importance of angle in Islamic prayer.