shaalaa.com
S

Video tutorials - Mathematics: Geometry - Triangles (Central Board of Secondary Education (CBSE))

Account
User


Login
Register


      Forgot password?
Share
Notifications

View all notifications
Books Shortlist
Your shortlist is empty
Subject:   Mathematics
Topic:   Geometry - Triangles

Video Series

We have provided more than 1 series of video tutorials for some topics to help you get a better understanding of the topic.

Series 1


Series 2


shaalaa.com | Triangles part 1 (Similar Figures)

shaalaa.com


Next video


shaalaa.com


Triangles part 1 (Similar Figures) [00:11:01]
S

Series 1: playing of 46

Triangles
0%


Triangles part 1 (Similar Figures)
00:11:01
Triangles part 2 (Example Similar Figures)
00:08:46
Triangles part 3 (Thales theorem Activity)
00:04:14
Triangles part 4 (Thales theorem Proof)
00:12:36
Triangles part 5 (Converse of Thales theorem)
00:09:47
Triangles part 6 (Example Thales theorem)
00:11:30
Triangles part 7 (Example Thales theorem)
00:10:21
Triangles part 8 (Example Thales theorem)
00:10:31
Triangles part 9 (Example Thales theorem)
00:08:56
Triangles part 10 (Internal Bisector Theorem)
00:09:49
Triangles part 11 (Converse Internal Bisector Theorem)
00:06:58
Triangles part 12 (External Angle Bisector)
00:06:05
Triangles part 13 (Examples Angle Bisector)
00:09:02
Triangles part 14 (Examples Angle Bisector)
00:11:09
Triangles part 15 (Examples Angle Bisector)
00:11:54
Triangles part 16 (Examples Angle Bisector)
00:12:00
Triangles part 17 (Examples Angle Bisector)
00:08:04
Triangles part 18 (AAA Angle Angle Angle Similarity)
00:12:35
Triangles part 19 (SSS Side Side Side Similarity)
00:07:27
Triangles part 20 (SAS Side Angle Side Similarity)
00:06:34
Triangles part 21 (Examples Similarity of triangle)
00:12:27
Triangles part 22 (Examples Similarity of triangle)
00:13:36
Triangles part 23 (Examples Similarity of triangle)
00:14:20
Triangles part 24 (Examples Similarity of triangle)
00:08:04
Triangles part 25 (Examples Similarity of triangle)
00:12:49
Triangles part 26 (Examples Similarity of triangle)
00:11:09
Triangles part 27 (Examples Similarity of triangle)
00:11:00
Triangles part 28 (Examples Similarity of triangle)
00:12:53
Triangles part 29 (Examples Similarity of triangle)
00:12:30
Triangles part 30 (Examples Similarity of triangle)
00:08:14
Triangles part 31 (Examples Similarity of triangle)
00:06:30
Triangles part 32 (Examples Similarity of triangle)
00:13:39
Triangles part 33 (Examples Similarity of triangle)
00:09:10
Triangles part 34 (Examples Similarity of triangle)
00:07:00
Triangles part 35 (Theorem Ratio of Sides of triangle)
00:08:12
Triangles part 36 (Theorem Ratio of Area of triangle)
00:10:42
Triangles part 37 (Example Ratio of Area of triangle)
00:10:05
Triangles part 38 (Proof Pythagoras Theorem)
00:11:12
Triangles part 39 (Proof Converse of Pythagoras Theorem)
00:03:31
Triangles part 40 (Acute and Obtuse angle theorem Proof)
00:11:26
Triangles part 41 (Example Pythagoras Theorem)
00:11:47
Triangles part 42 (Example Pythagoras Theorem)
00:09:18
Triangles part 43 (Example)
00:11:34
Triangles part 44 (Example Pythagoras Theorem)
00:08:00
Triangles part 45 (Example Pythagoras Theorem)
00:12:03
Triangles part 46 (Example and Summary)
00:06:49

Feedback

Description

Definitions, examples, counter examples of similar triangles.

  1. (Prove) If a line is drawn parallel to one side of a triangle to intersect the other two sides in distinct points, the other two sides are divided in the same ratio.
  2. (Motivate) If a line divides two sides of a triangle in the same ratio, the line is parallel to the third side.
  3. (Motivate) If in two triangles, the corresponding angles are equal, their corresponding sides are proportional and the triangles are similar.
  4. (Motivate) If the corresponding sides of two triangles are proportional, their corresponding angles are equal and the two triangles are similar.
  5. (Motivate) If one angle of a triangle is equal to one angle of another triangle and the sides including these angles are proportional, the two triangles are similar.
  6. (Motivate) If a perpendicular is drawn from the vertex of the right angle of a right triangle to the hypotenuse, the triangles on each side of the perpendicular are similar to the whole triangle and to each other.
  7. (Prove) The ratio of the areas of two similar triangles is equal to the ratio of the squares of their corresponding sides.
  8. (Prove) In a right triangle, the square on the hypotenuse is equal to the sum of the squares on the other two sides.
  9. (Prove) In a triangle, if the square on one side is equal to sum of the squares on the other two sides, the angles opposite to the first side is a right angle.
S