Plane Geometry Flashcards
Book of Euclid which given emphasis on Plane Geometry
Elements
Branch of Geometry that deals with plane figure or geometrical shapes of two dimensions
Plane Geometry
Branch of Geometry deals with properties of geometrical shapes of three dimensions such as cones, pyramids, cylinders
Solid Geometry
Branch of Geometry based on the assumptions of Euclid
Euclidean Geometry
Branch of Geometry that is not based on the assumption of Euclid
Non-Euclidean Geometry
Branch of Geometry that deals with the study of those properties of plane figures that are unchanged when given set of points is projected onto a second plane
Projective Geometry
Branch of Geometry which specializes on the study of triangle
Trigonometry
Branch of Geometry that deals with geometric problems by using the coordinate systems and transforming them into algebraic problems
Analytic Geometry
Branch of Geometry that applies differential and integral calculus to curves, surfaces and other geometric entities
Differential Geometry
What are the 5 basic postulate of Euclid?
- A unique line can be drawn between any two points
- Such line can be extended indefinitely in either direction
- A circle can be drawn in a plane using a given point (a center) and a given distance(a radius)
- All right angles are equal
- Given a line and a point not on the line, there exist exactly one line parallel to the original line passing through the given point (aka parallel postulate)
A dimensionless geometric figure having no properties other than location or place
Point
The shortest distance between any two points.
Line
The opening between two lines or planes that meet
Angle
What is a straight angle?
Equal to 180 degrees or (pi) radians
What is a reflex angle?
Greater than 180 degrees but less than 360 degrees
What is a Full angle or Perigon?
Equal to 360 degrees or 2*pi radians
Two angles with a common leg
Adjacent angles
Two angles where the sum is a right angle
Complementary Angles
Two angles where the sum is a straight angle (180degrees)
Supplementary angles
Two angles whose sum is a perigon
Explementary angles
Angles formed by two intersecting lines
Vertical Angles
It is a unit of angle based on sexagesimal system
Degree
Standard angular measure in international system of units
Radian
It is a measure ofan angle which is 1/6400 of the full circle
Mil
1 Revolution in terms of Gon
400
1 Revolution in terms of Mil
6400
Number of sides of regular Hectagon
100
Number of sides of a regular Megagon
10^6
Number of sides of a regular googolgon
100^100
How many sides does Undecagon have?
11
How many sides of Dodecagon
12
It is the inward pointing angle of the concave polygon
Reentrant angle
Other angles of a concave polygon except the Reentrant angle
Salient Angle
it is the line connecting two opposite vertices
diagonal
Number of diagonals formula
No. of Diagonals=(n/2)*(n-3)
where n=number of sides
formula of sum of interior angles
(n-2)*180degrees
It is the angle subtended by the prolongation of one side to the next
deflection angle