The document Facts That Matter- Triangles Class 10 Notes | EduRev is a part of the Class 10 Course Mathematics (Maths) Class 10.

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**Facts that Matter**

We know that two geometric figures are said to be congruent, if they have the same shape and the same size. Two geometric figures having the same shape (but not necessarily the same size) are called similar figures.**Similar Polygons:**

Two polygons are similar if:

(i) The lengths of their corresponding sides are proportional.

(ii) Their corresponding angles are equal.

Remember:I. Two congruent figures are always similar but two similar figures need not to be congruent.

II. All line segments are similar.

III. All equilateral triangles are similar.

IV. All squares are similar.

V. All circles are similar.

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178 videos|268 docs|103 tests

### Short Answer Type Questions (Part 1) - Triangles

- Doc | 4 pages
### Similar Triangles

- Video | 03:53 min
### Short Answer Type Questions (Part 2) - Triangles

- Doc | 5 pages
### Test: Basic Proportionality Theorem

- Test | 5 ques | 10 min
### Criteria for Similarity of Triangles

- Video | 12:14 min
### Test: Criteria For Similar Triangles

- Test | 10 ques | 10 min

- Another Proof of Theorem
- Video | 25:16 min
- Test: Triangles- 4
- Test | 25 ques | 25 min