Basic Concepts In Geometry

•

POINT
*Any two points are always collinear.
Coplanar Points – F, A, L, I, C

Coplanar Points – G, E, O, B

Line is union of all collinear points.
Number Line
Intersecting Lines.
Three or more than three lines intersecting in one point are concurrent lines.
Plane is a any flat surface that can be extended indefinitely.
It is the part of a line
A is starting or end point of a ray
Angle
Types of angles based on its measure
Adjacent angles have a common vertex and a common ray
Angles in linear pairs
Angle 1 + Angle 2 = ?
Supplementary Angles: Angles whose sum is 180 are supplementary.
110 + 70 = 180
Vertically Opposite Angles
Angles which are vertically opposition have same measure.

x = ? and y = ?

m = ?