Course Content
Class 7th Science
0/36
Class 7th Math
0/71
Class 7 Social Science Geography
0/20
Class 7 Social Science History
0/20
Class 7 Social Science Civics
0/19
Class 7 English Honeycomb
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Class 7 English Honeycomb Poem
0/18
Class 7 English An Alien Hand Supplementary
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Online Class For 7th Standard Students (CBSE)

## Introduction to Congruent Triangles

### Congruent Figures

• Congruent figures are exactly equal in size and shape

### Congruent Triangles

• If all the sides and angles of a triangle are equal to the corresponding sides and angles of another triangle, then both the triangles are said to be congruent.
• Here, ABCDEF

## Criteria for Congruency

### SSS Criteria for Congruency

• If under a given correspondence, the three sides of one triangle are equal to the three corresponding sides of another triangle, then the triangles are congruent. ### SAS Criteria for Congruency

• If under a correspondence, two sides and the angle included between them of a triangle are equal to two corresponding sides and the angle included between them of another triangle, then the triangles are congruent. ### ASA Criteria for Congruency

• If under a correspondence, two angles and the included side of a triangle are equal to two corresponding angles and the included side of another triangle, then the triangles are congruent. ### AAS Criteria for Congruency

AAS Rule: Triangles are congruent if two pairs of corresponding angles and a pair of opposite sides are equal in both triangles.  ### RHS Criteria for Congruency

• If under a correspondence, the hypotenuse and one side of a right-angled triangle are respectively equal to the hypotenuse and one side of another right-angled triangle, then the triangles are congruent. ### Criteria for Congruency

Criteria for Congruency of two triangles are:
(i) SSS Rule
(ii) SAS Rule
(iii) ASA Rule
(iv) RHS Rule