Question

define the following : collinear point,non collinear point,acute angle,reflex angle,linear pair, vertically opposite angle,adjacent angle​

Answer 1

Points lying on the same straight line is called collinear points

Points doesn't lying on the same straight line is called non,-collinear points

Angle less than 90° is called acute angle

angles lying on the same side of a st. line whose sum is 180° is called linear pair

When two lines intersect each other at a point then the angles formed on the opposite side of the vertex are called vertically opposite angle

In a Polygon angle lying on the same side is called adjacent angle