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Triangles (view source)

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''[https://karnatakaeducation.org.in/KOER/index.php/%e0%b2%a4%e0%b3%8d%e0%b2%b0%e0%b2%bf%e0%b2%ad%e0%b3%81%e0%b2%9c%e0%b2%97%e0%b2%b3%e0%b3%81 ಕನ್ನಡದಲ್ಲಿ ನೋಡಿ]''</div>
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''[https://karnatakaeducation.org.in/KOER/index.php/%e0%b2%a4%e0%b3%8d%e0%b2%b0%e0%b2%bf%e0%b2%ad%e0%b3%81%e0%b2%9c%e0%b2%97%e0%b2%b3%e0%b3%81 ಕನ್ನಡ]''</div>
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{{#drawio:mmTriangles}}
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===Concept Map===
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{{#drawio:mmTriangles|interactive}}
    
===Learning Objectives===
 
===Learning Objectives===
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==== Concept #: Types of triangles based on sides and angles ====
 
==== Concept #: Types of triangles based on sides and angles ====
 
Variations in elements that make a triangle results in distinct triangles. Recognizing these variations helps in interpreting changes that are possible with in a triangle.
 
Variations in elements that make a triangle results in distinct triangles. Recognizing these variations helps in interpreting changes that are possible with in a triangle.
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'''Video resource:''' Explanation of Types of Triangles by NCERT.
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{{Youtube|SXYZd536Vao
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}}
    
===== Activities # =====
 
===== Activities # =====
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====== [[Angle sum property]] ======
 
====== [[Angle sum property]] ======
 
Interior angles of a triangle are in relation and also determine the type of angles that can forms a triangle. This also helps in determining an unknown angle measurement.
 
Interior angles of a triangle are in relation and also determine the type of angles that can forms a triangle. This also helps in determining an unknown angle measurement.
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'''Video resource:''' Classroom activity for angle sum property of Triangle by NCERT
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{{Youtube|BRDAXvQlzt0
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}}
    
====== [[Angle sum property of a Triangle]] ======
 
====== [[Angle sum property of a Triangle]] ======
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==== Concept #: [[Similar and congruent triangles]] ====
 
==== Concept #: [[Similar and congruent triangles]] ====
 
Two objects are similar if they have the same shape, but not necessarily the same size. This means that we can obtain one figure from the other through a process of expansion or contraction, possibly followed by translation, rotation or reflection. If the objects also have the same size, they are congruent. Two triangles are said to be congruent to one another only if their corresponding sides and angles are equal to one another
 
Two objects are similar if they have the same shape, but not necessarily the same size. This means that we can obtain one figure from the other through a process of expansion or contraction, possibly followed by translation, rotation or reflection. If the objects also have the same size, they are congruent. Two triangles are said to be congruent to one another only if their corresponding sides and angles are equal to one another
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==== Concept #: [https://karnatakaeducation.org.in/KOER/en/index.php/Basic_Proportionality_Theorem Basic Proportionality Theorem] ====
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The concept of Thales theorem has been introduced in similar triangles. If the given two triangles are similar to each other then,
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*    Corresponding angles of both the triangles are equal
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*    Corresponding sides of both the triangles are in proportion to each other
    
==== Solved problems/ key questions (earlier was hints for problems) ====
 
==== Solved problems/ key questions (earlier was hints for problems) ====
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=== Projects (can include math lab/ science lab/ language lab) ===
 
=== Projects (can include math lab/ science lab/ language lab) ===
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'''''Laboratory Manuals''' - Mathematics : [https://ncert.nic.in/pdf/publication/sciencelaboratorymanuals/classIXtoX/mathematics/lelm402.pdf Click here] to refer activity 15,16,18 and 20'' which explains the properties of Triangle.
    
=== Assessments - question banks, formative assessment activities and summative assessment activities ===
 
=== Assessments - question banks, formative assessment activities and summative assessment activities ===
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# [[:File:Introducction to Triangles.pdf|Introduction to triangles]]
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# [[:File:Types of Triangle by sides.pdf|Types of Triangle by sides]]
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# [[:File:Properties of Triangles.pdf|Properties of Triangle]]
 
[[Category:Class 9]]
 
[[Category:Class 9]]
 
[[Category:Class 8]]
 
[[Category:Class 8]]
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