NCERT - 8 - Maths :: Practical Geometry

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[Author - Kripa S]

Objective: Explain how to construct a quadrilateral based on given information

Subtopics to be covered:

- 4 sides and 1 diagonal

- 3 sides and 2 diagonals

- 3 sides and 2 included angles

- 2 adjacent sides and 3 angles

Learning Outcome:

- Students can construct a quadrilateral based on given measurements in one of the above 4 categories

[Author - Kripa S]

http://epathshala.nic.in/wp-content/doc/book/flipbook/ClassVIIIFlipbook/0853-Ganit/Chapter_4/index.html (NCERT Hindi Medium)

http://epathshala.nic.in/wp-content/doc/book/flipbook/ClassVIIIFlipbook/0852-Mathematics/4/index.html (NCERT English Medium)

https://drive.google.com/open?id=0BzNF2YyqQxJ-NkVxNHZ3MG4zRGM (JEPC Board) (Hindi Medium)

https://drive.google.com/open?id=0BzNF2YyqQxJ-WE5PUEJMazcwaDg (JEPC Board) (Hindi Medium)

[Author - Kripa S]

https://www.youtube.com/watch?v=dWZswov3EiY (Construction of Quadrilateral Video 1)

https://www.youtube.com/watch?v=NpN3tXLE9x8 (Construction of Quadrilateral Video 2)

[Author - Kripa S]

https://i.ytimg.com/vi/yTFfWMCZYK4/maxresdefault.jpg (Geometry Box)

https://upload.wikimedia.org/wikipedia/commons/thumb/3/32/Geom_compass_ruler.png/800px-Geom_compass_ruler.png (how to use a ruler, compass)

http://www.technologystudent.com/images7/obliq3.gif (Use of set squares)

http://www.helpingwithmath.com/images/geometry/angles_measuring11.gif (use of protractor)

[Author - Kripa S]

1. Take 2 pens or sticks on one length and 2 more of a different length. Make a rectangle using these 4 sticks. Push two opposite side sticks a little changing its angle from 90 deg. Is it still a rectangle or is it a parallelogram? Push the newly formed shape to the other side to make a different angle. Would it then be called a rectangle? Share your views.

[Author - Apoorva Khadilkar]

https://drive.google.com/open?id=0BzNF2YyqQxJ-MExZS3NZWm1LVm8

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Anonymous user #1

89 months ago

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Perpendicular is also called 'Lumb'.

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