1. CLIL
Contents and
Language
Integrated
learning

2. Congruence, equivalence and similarity
Plane Geometry
Congruence, equivalence and similarity

3. congruence

4. Congruence
Two figures are congruent if they have exactly the same size and shape.

5. Precisely two plane figures are said congruent, if there is a rigid motion (which does not lead to deformation), which can lead one of the two figures to coincide with another .

6. Congruence
When two figures are congruent, there is a correspondence between their angles and sides such that corresponding angles are congruent and corresponding sides are congruent.

7. In other words, they have matching angles and matching sides
Congruence
In other words, they have matching angles and matching sides

8. equivalence

9. equivalence
In geometry plane, equivalence is the propriety of two or more plane figures which have the same extension.

10. equivalence
The equivalence is a relationship between geometric figures that do not necessarily have the same shape, but have the same area.

11. equivalence
These figures are equivalent because they are equally composed

12. equivalence
The equivalence relation has three properties which are reflexive, symmetric and transitive.

13. reflexive propriety
a figure is always equivalent to itself

14. symmetric
if the figure a is equivalent to b, then b is equivalent to a;

15. transitive
Finally, if a is equivalent to b and b is equivalent to c, then a is equivalent to c
A B C

16. similarity

17. These two postcards, which are similar, aren`t the same
similarity
These two postcards, which are similar, aren`t the same
This feature of polygons is called similarity

18. similarity
There is similarity between two or more polygons if all corresponding angles are congruent and all corresponding sides are proportional.

19. similarity
Figures that have the same shape, but do not have the same size, have a relationship of similarity
A B

21. BY
NICK
AND
VICTOR