k-12 curriculum grade 9 geometry. Geometry is the study of different types of shapes, figures and sizes in Maths or in real life. In geometry, we learn about different angles, transformations and similarities in the figures. The basics of geometry depend on majorly point, line, angles and plane.
2. Two geometric figures with
exactly the same size and
shape.
The Idea of a Congruence
A C
B
D
E
F
3. How much do you
need to know. . .
. . . about two triangles
to prove that they
are congruent?
4. In Lesson 4.2, you learned that if all
six pairs of corresponding parts (sides
and angles) are congruent, then the
triangles are congruent.
Corresponding Parts
ABC DEF
1. AB DE
2. BC EF
3. AC DF
4. A D
5. B E
6. C F
22. Let’s Practice
Indicate the additional information needed
to enable us to apply the specified
congruence postulate.
For ASA:
For SAS:
B D
For AAS: A F
AC FE
23. HW
Indicate the additional information needed
to enable us to apply the specified
congruence postulate.
For ASA:
For SAS:
For AAS:
24. This powerpoint was kindly donated to
www.worldofteaching.com
http://www.worldofteaching.com is home to over a
thousand powerpoints submitted by teachers. This is a
completely free site and requires no registration. Please
visit and I hope it will help in your teaching.