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Parallel lines and Perpendicular lines (view source)
Revision as of 20:40, 25 February 2021
, 20:40, 25 February 2021no edit summary
=== Objectives ===
To enable students to-
# understand the concept of parallel lines and perpendicular lines;
# identify differences between parallel lines and non parallel lines;
# understand about when two lines can be parallel (constant perpendicular distance)
# to measure the perpendicular distance between two lines.
# to provide hands-on experience through Geogebra application.
=== Estimated Time ===
90 minutes
=== Prerequisites/Instructions, prior preparations, if any ===
Prior understanding of lines and angles, right angle as 90 degree, use of protractor to measure/draw an angle.
=== Materials/ Resources needed ===
* Digital : Computer, Geogebra application, projector.
* Non-digital : Geometrical tools, pencil and worksheet.
=== Process (How to do the activity) ===
'''Teachers work:'''
* Show examples of pictures with parallel and non-parallel lines.
* Help students to identify their differences.
* Ask students on how they can conclude two line/segments are parallel and record the same.
* Introduce about the concept of perpendicular lines
* Help students understand that perpendicular line is the shortest distance between a pair of lines.
* Demonstrate using Geogebra how to plot parallel lines and check if perpendicular distance remains fixed between them.
* Ask students to give more examples of parallel lines in real life situations and their importance.
'''Students work:'''
* Identify the difference between parallel and non-parallel lines.
* Identify the parallel lines in their surroundings and measure the distance between them at various regions.
* Plot parallel lines using Geogebra and try to measure perpendicular distance between them.
* Plot perpendicular line using Geogebra and understand it as the shortest distance between two lines.
* Analyse the importance of parallel lines in real life situations.
=== Developmental questions of the activity ===
# When can we say two lines to be parallel and non-parallel?
# Why are the rods of a window parallel?
# Why are the electric cables laid parallel to each?
# What is the shortest distance between a pair of lines?
# What is the angle measurement of a perpendicular line?
# Where do you see perpendicular line in your surroundings?
# Can buildings have slant on perpendicular pillars? Why?
# Where do you see parallel lines in real life situations? What is the importance of lines been parallel in them?
=== Evaluation at the end of the activity ===
