what is Congruent & similar triangle??

1. Triangle
Introduction

2. Triangle
Square
Circle
Different Shapes

3. What is Square ?
• Having all sides all
equal
• All sides make right
angle to each other

4. All Squares and Circles have
same shape

5. But Triangle have number of different
shapes
Triangle
Square
Circle

6. But Triangle have number of different
shapes

7. Classification of triangle
Based on their sides
Based on their angles

8. AND

9. Classification based on their
Sides
1.Equilateral Triangle
2.Isosceles triangles
3. Scalene triangle

10. Equilateral Triangle
• Equal sides
• Equal Angles

11. Isosceles triangles
• Has two equal

12. Scalene triangle
• Has no equal sides

13. Classification based on their
Angles
• Right Angle triangle
• Acute Angle triangle
• Obtuse Angle triangle

14. 1. Right Angle
2. Acute Angle
3. Obtuse Angle
4. Reflex Angle
Classification of Angles

15. Classification of Angles
• Acute Angle: acute" meaning "small" is
an angle smaller than a right angle. The range
of an acute angle is between 0 and 90
degrees.

16. Classification of Angles
• Right Angle: is an angle of exactly 90°,
corresponding to a quarter turn.

17. Classification of Angles
• Obtuse angle- more than 90° and less than
180°.

18. Classification of Angles
• Reflex angle- more than 180° and less than
270°.

19. Classification of triangles based
on their Angles
• Right Angle triangle
• Acute Angle triangle
• Obtuse Angle triangle

20. Summary

21. Congruent figures or objects
• Same Shape, same size

22. Congruent figures or objects
• Same Shape, same size
• Two figures or objects are congruent if they
have the same shape and size

23. Similar figures or objects
• The figures have the same shape, but not
the same size.

24. Similar figures or objects
• Two polygons of the same number of sides are similar
if
(i) Their corresponding angles are equal and
(ii) Their corresponding sides are in the same ratio(or
proportion)
18

25. What is Polygon?
• A polygon is any 2-dimensional shape formed
with straight lines. Triangles, quadrilaterals,
pentagons, and hexagons are all examples of
polygons.
• The name tells you how many sides the shape
has. For example, a triangle has three sides, and a
quadrilateral has four sides, pentagon has five
sides and hexagons has
• Note: Circle is not polygon.

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