Difference between revisions of "Introduction to history"
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* Books and journals | * Books and journals | ||
* Textbooks | * Textbooks | ||
| − | * NCERT Textbooks – Class 11 | + | * [http://ncert.nic.in/textbook/textbook.htm?kehs1=1-4 NCERT Textbooks – Class 11] |
** [https://drive.google.com/file/d/0B5WLdFVMntmtNTMxcGNWYzRuNFk/view Karnataka Govt Text book – Class 11] | ** [https://drive.google.com/file/d/0B5WLdFVMntmtNTMxcGNWYzRuNFk/view Karnataka Govt Text book – Class 11] | ||
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# [[Elements of a triangle]]: Terms that are associated with triangle. | # [[Elements of a triangle]]: Terms that are associated with triangle. | ||
# [[Measures in triangle]]: Parameters that are measured in a triangle. | # [[Measures in triangle]]: Parameters that are measured in a triangle. | ||
| − | # [[Interior and exterior angles in triangle]]: Angles formed when a triangle is formed. | + | # [[Interior and exterior angles in triangle]]: Angles formed when a triangle is formed. [[Category:Triangles]] |
[[Category:Class 8]] | [[Category:Class 8]] | ||
Revision as of 09:45, 23 April 2019
Concept Map
Additional Resources
OER
- Web resources:
- Books and journals
- Textbooks
- NCERT Textbooks – Class 11
- Syllabus documents
Non-OER
- Web resources:
- Historical thinking : blurb
- Books and journals
- Textbooks
- Syllabus documents (CBSE, ICSE, IGCSE etc)
Learning Objectives
- Identify a triangle
- Recognize interior and exterior angles
- Classifying types of triangles
- Recognize the angle sum property
- Establish relation between interior and exterior angles
Teaching Outlines
Concept 1: Formation of a triangle, elements of a triangle and its measures
- A triangle is a three sided closed figure.
- It is one of the basic shapes in geometry.
- It triangle is a polygon with three edges and three vertices.
- There are three angles in a triangle formed at the three vertices of the triangle.
- Interior and exterior angles in a triangle at a vertex, together form a linear pair.
Activities
- Formation of a triangle: A plane figure formed by three intersecting lines.
- Elements of a triangle: Terms that are associated with triangle.
- Measures in triangle: Parameters that are measured in a triangle.
- Interior and exterior angles in triangle: Angles formed when a triangle is formed.
Concept 2: Types of triangles based on sides and angles
Types of triangles based on angles in the triangle
- Acute triangles are triangles in which the measures of all three angles are less than 90o.
- Obtuse triangles are triangles in which the measure of one angle is greater than 90o.
- Right triangles are triangles in which the measure of one angle equals 90 degrees.
Types of triangles based on sides in the triangle
- Equilateral triangles are triangles in which all three sides are the same length.
- Isosceles triangles are triangles in which two of the sides are the same length.
- Scalene triangles are triangles in which none of the sides are the same length.
Activities
- Types of triangles based on sides: Triangles formed are dependent on measures of sides.
- Types of triangles based on angles: Triangles formed are dependent on measures of angles.