View source for Intersection of two lines

=== Objectives ===
To verify vertically opposite angles are equal

=== Estimated Time ===
20 minutes

=== Prerequisites/Instructions, prior preparations, if any ===
Knowledge about point, line, angle

=== Materials/ Resources needed ===
Digital: Click here to [[:File:Intersection of two lines.ggb|open]] the file

Non-digital: Paper, pencil, ruler, compass, protractor

===Process (How to do the activity) ===
{{Geogebra|haaj2yr5}}'''Procedure :''' 
# What are intersecting lines?
# Identify two lines cross each other in a plane i.e. lines 'g' and 'f' intersect at point 'A'
# Identify intersecting lines (two or more) meet only at one point always and also can cross each other at common vertex (which is the point of intersection).
# Identify the angles formed at common vertex 'A'
# Identify two pairs of opposite angles
# What is the vertically opposite angle?how many pair of vertically opposite angles are formed?
# Identify and measure vertically opposite angles?What is your conclusion? 
# Can vertically opposite angles be adjacent?
# How many pairs of adjacent angles are formed?
# Idenify and measure adjacent angles?What is your conclusion?
=== Evaluation at the end of the activity ===
# Can two lines cross at two points?
# If out of two angles of linear pair one is 60°, then what is the measure of other angle?
# If two angles are vertically opposite angles, where the measure of one of the angles is 30°, then what is the measure of other angle?
Go back - [[KVS Lines and Angles|click here]]

[[Category:Lines and Angles]]