NCERT - 7 - Maths :: The Triangle and its Properties

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[Author - Kripa S]

Objective: Explain properties of triangle for different types of triangle

Subtopics to be covered:

- Revise types of triangles based on sides and angles

- Median and Altitude of a triangle

- Exterior angle of triangle and its property

- Angle sum Property of triangle

- Property on sum of lengths of sides of triangle

Learning Outcome:

- Students can solve problems based on the above concepts

[Author - Kripa S]

http://epathshala.nic.in/wp-content/doc/book/flipbook/Class%20VII/0757-Ganit/Chap-6/index.html (NCERT Hindi Medium)

http://epathshala.nic.in/wp-content/doc/book/flipbook/Class%20VII/0756-Mathematics/Chapter%206/index.html (NCERT English Medium)

https://drive.google.com/open?id=0BzNF2YyqQxJ-azBaSHk2NG9LT3M (JEPC Board) (Hindi Medium)

[Author - Rishi Mazumdar]

https://youtu.be/4jVoVOq6v2E (Khan Academy - Properties of Triangle)

https://hi.khanacademy.org/math/in-seventh-grade-math/triangle-pror (Properties of Triangle)

[Author - Kripa S]

https://s3-ap-southeast-1.amazonaws.com/learnhive/lcards/Types-of-Triangles-521dd275368b9.png (types of triangles)

http://s3-ap-southeast-1.amazonaws.com/subscriber.images/maths/2016/06/22114543/ALTITUDE.png (Altitudes of a triangle)

http://s3-ap-southeast-1.amazonaws.com/subscriber.images/maths/2016/06/22114547/Triangle.Centroid.Median.png (Medians of a triangle)

http://image.wistatutor.com/content/feed/u774/angle%20pro3.JPG (exterior angle property)

https://dj1hlxw0wr920.cloudfront.net/userfiles/wyzfiles/f0516fa1-669b-441d-9f11-a33907a2a0b0.gif (Angle sum property of a triangle)

https://upload.wikimedia.org/wikipedia/commons/thumb/b/b2/TriangleInequality.svg/220px-TriangleInequality.svg.png ( Property of lengths of sides of triangle)

[Author - Kripa S]

1. Can a median of a side of triangle be out of the triangle ? Try and see.

2. Draw one equilateral triangle, one isosceles triangle, one scalene triangle. Find their altitudes and means. What is common about them?

[Author - Apoorva Khadilkar]

https://drive.google.com/open?id=0B4m07xnDF8JpWVp5Zm1GcXI0LUU

Term'	Transliterated Term	Translated Term
Triangle	ट्रायंगल	त्रिभुज
Vertices	वरटिसेस	कोने
Scalene	स्केलीन	विषम भुज तथ कोण वाला
Isoceles	आइसोसेलेस	समद्विबाहु
Equilateral	इक्विलाटेरल	समभुज
Acute	एक्यूट	तीव्र
Obtuse	ओब्ट्यूस	कुंठित
Right angle	राइट एंगल	समकोण
Altitude	अल्टीट्यूड	ऊंचाई
Height	हाइट	ऊंचाई
Interior	इंटीरियर	आंतरिक
Exterior	एक्सटेरियर	बाहरी

[Author - Apoorva Khadilkar]

https://drive.google.com/open?id=0B4m07xnDF8JpN3RLeEp5QmFTUHc

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