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+====== [[Relation between interior and exterior angles in triangle|Exterior angle theorem:]] Relation between angles formed inside a triangles and angles outside a triangle ======
===== Activities =====
===== Activities =====
−====== [[Formation of a triangle]]: A plane figure formed by three intersecting lines. ======
+====== [[Formation of a triangle]] ======
+A plane figure formed by three intersecting lines.
−====== [[Measures in triangle|Elements and measures in triangle]]: Parameters that are associated and measured in a triangle. ======
+====== [[Measures in triangle|Elements and measures in triangle]] ======
+Parameters that are associated and measured in a triangle.
−====== [[Interior and exterior angles in triangle]]: Angles that are formed when a triangle is formed. ======
+====== [[Interior and exterior angles in triangle]] ======
+Angles that are formed when a triangle is formed.
[[Category:Triangles]]
[[Category:Triangles]]
[[Category:Class 8]]
[[Category:Class 8]]
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===== Activities =====
===== Activities =====
−====== [[Types of triangles based on sides]]: Formation of a triangle depends on measures of sides. ======
+====== [[Types of triangles based on sides]] ======
+Formation of a triangle depends on measures of sides.
−====== [[Types of triangles based on angles]]: Formation of a triangle depends on measures of angles. ======
+====== [[Types of triangles based on angles]] ======
+Formation of a triangle depends on measures of angles.
==== Concept 3: Theorems and properties ====
==== Concept 3: Theorems and properties ====
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===== Activities =====
===== Activities =====
−====== [[Angle sum property]] : Relation between angles formed inside a triangle ======
+====== [[Angle sum property]] ======
+Relation between angles formed inside a triangle
+====== [[Relation between interior and exterior angles in triangle|Exterior angle theorem]] ======
+Relation between angles formed inside a triangles and angles outside a triangle
−==== Concept 4: Construction of triangles ====
==== Concept 4: Construction of triangles ====
Constructing geometric shapes to precision using a scale and a compass helps in understanding of properties of the shape. Constructing geometric shapes with minimum number of parameters enhances thinking skills.
Constructing geometric shapes to precision using a scale and a compass helps in understanding of properties of the shape. Constructing geometric shapes with minimum number of parameters enhances thinking skills.
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===== Activities =====
===== Activities =====
−====== [[Construction of a triangle with 3 sides|Construction of a triangle with three sides:]] Construction of a triangle based on the SSS congruence rule ======
+====== [[Construction of a triangle with 3 sides|Construction of a triangle with three sides]] ======
+Construction of a triangle based on the SSS congruence rule
−====== [[Construction of a triangle with two sides and included angle|Construction of a triangle with two sides and an angle]]: Construction of a triangle based on SAS congruence rule ======
+====== [[Construction of a triangle with two sides and included angle|Construction of a triangle with two sides and an angle]] ======
+Construction of a triangle based on SAS congruence rule
−====== [[Construction of a triangle with two angles and included side]]: Construction of a triangle based on ASA congruence rule ======
+====== [[Construction of a triangle with two angles and included side]] ======
+Construction of a triangle based on ASA congruence rule
−====== [[Construction of a right triangle with a side and hypotenuse|Construction of a right angled triangle]]: Construction of a triangle based on RH congruence rule ======
+====== [[Construction of a right triangle with a side and hypotenuse|Construction of a right angled triangle]] ======
+Construction of a triangle based on RH congruence rule
−====== [[Construction of a triangle with perimeter and base angles]]: Construction on a triangle with give parameters using SAS congruence rule ======
+====== [[Construction of a triangle with perimeter and base angles]] ======
+Construction on a triangle with give parameters using SAS congruence rule
−====== [[Construction of a triangle with side, angle and sum of other two sides|Construction of a triangle with a side, an angle and sum of two sides]]: Construction on a triangle with give parameters using SAS congruence rule ======
+====== [[Construction of a triangle with side, angle and sum of other two sides|Construction of a triangle with a side, an angle and sum of two sides]] ======
+Construction on a triangle with give parameters using SAS congruence rule
−====== [[Construction of a triangle with side, angle and difference of other two sides|Construction of a triangle with a side, an angle and difference to two sides:]] Construction on a triangle with give parameters using SAS congruence rule ======
+====== [[Construction of a triangle with side, angle and difference of other two sides|Construction of a triangle with a side, an angle and difference to two sides]] ======
+Construction on a triangle with give parameters using SAS congruence rule
==== Concept 5: Concurrency in triangles ====
==== Concept 5: Concurrency in triangles ====