Geometry
Geometry is a branch in mathematics which deals with all the shapes and their properties. It can be divided into two types:
- Plane Geometry.
- Solid Geometry.
Plane Geometry
Plane geometry is all about flat shapes circles, lines, triangles etc. All the shapes that can be drawn on paper.
Solid Geometry
Solid geometry deals with 3D (three dimensional) objects. For example: cube, prism, cylinder etc.
What is a Point, Line and a Ray?
Point: It is defined as a particular or precise location on a piece of paper or a plane surface, represented by a dot.
Line: A line can be said a combination of infinite points together. It extends in both the directions.
Ray: When a line has starting point and no end point it is called as ray.
Angle
Angle is a figure formed by two lines or rays, sharing a common end point (vertex).
Types of angles:
- Acute angle.
- Right angle.
- Obtuse angle.
- Straight angle.
- Reflex angle.
- Full angle.
Acute Angle
Angle smaller than 90⁰ is called acute angle. It ranges from 0⁰ - 90⁰.
Right Angle
An angle of 90⁰.
Obtuse Angle
Angle greater than 90⁰ but lesser than 180⁰ is called an obtuse angle. It ranges from 90⁰ - 180⁰.
Straight Angle
An angle of 180 is called straight angle. It is formed by a straight line.
Reflex Angle
Angle greater than 180⁰ but lesser than 360⁰ is called a reflex angle.
Full Angle
An angle which has an exact measure of 360⁰ is called full angle.
