### Theory

 1 Classification of triangles 2 Constructing a triangle 3 Properties of triangle 4 Congruence of triangles 5 Criteria for congruence of triangle 6 Side-Side-Side (SSS) congruence criterion 7 Side-Angle-Side (SAS) congruence criterion 8 Angle-Side-Angle (ASA) congruence criterion 9 Right Angle-Hypotenuse-side (RHS) congruence criterion

### Exercises

 1 Choose the correct answer Difficulty: easy 1 2 Evaluating the congruence of triangles Difficulty: easy 1 3 Construct a triangle using equal length Difficulty: easy 1 4 Construct the acute angled triangle using equal length Difficulty: easy 1 5 Construct a right angled triangle using equal length Difficulty: easy 1 6 Construct an triangle uisng different sides length Difficulty: medium 2 7 Construct the obtuse angled triangle Difficulty: medium 1 8 Construct the obtuse angled triangle using different length Difficulty: medium 1 9 Construct the acute angled triangle Difficulty: medium 1 10 Construct the triangle using angle Difficulty: medium 1 11 Construct the triangle using ASA congruence criteria Difficulty: medium 1 12 Using ASA congruence criteria construct the triangle Difficulty: medium 1 13 Construct an triangle uisng sides length Difficulty: hard 1 14 Construct a triangle using RHS criterion Difficulty: hard 1 15 Construct an triangle uisng SSS Criterion Difficulty: hard 1 16 Construct the isosceles traingle Difficulty: hard 1 17 Construct an equilateral triangle Difficulty: hard 1 18 Construct the triangle using SAS Criterion Difficulty: hard 1 19 Construct a triangle uisng SSS and RHS Criterion Difficulty: hard 2 20 Using ASA and RHS congruence criteria construct the triangle Difficulty: medium 2

### Tests

 1 Training test Difficulty: medium 3

### Teacher content

 1 Methodical recommendation