Transum Software

Congruent Triangles

Test your understanding of the criteria for congruence of triangles with this self-marking quiz.

Level 1 Level 2 More Geometry

This is level 1; Determining whether two triangles are congruent and finding the reason. The diagrams are not drawn to scale.

For each pair of triangles select the correct description of congruency.

1.Triangles 1

Correct Wrong

2.Triangles 2

Correct Wrong

3.Triangles 3

Correct Wrong

4.Triangles 4

Correct Wrong

5.Triangles 5

Correct Wrong

6.Triangles 6

Correct Wrong

7.Triangles 7

Correct Wrong

8.Triangles 8

Correct Wrong

9.Triangles 9

Correct Wrong

10.Triangles 10

Correct Wrong

This is Congruent Triangles level 1. You can also try:
Level 2


Try your best to answer the questions above. Choose one of the five possible answers. When you have finished click the "check" button. If you have any questions wrong, do your best to do corrections but if there is anything you don't understand, please ask your teacher for help.

When you have got all of the questions correct you may want to print out this page and paste it into your exercise book. If you keep your work in an ePortfolio you could take a screen shot of your answers and paste that into your Maths file. You can also claim a 'Transum Trophy' by completing this quiz.

This web site contains hundreds of free mathematical activities for teachers and students. Click here to go to the main page which links to all of the resources available.

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Comment recorded on the 3 October 'Starter of the Day' page by Mrs Johnstone, 7Je:

"I think this is a brilliant website as all the students enjoy doing the puzzles and it is a brilliant way to start a lesson."

Comment recorded on the 25 June 'Starter of the Day' page by Inger.kisby@herts and, :

"We all love your starters. It is so good to have such a collection. We use them for all age groups and abilities. Have particularly enjoyed KIM's game, as we have not used that for Mathematics before. Keep up the good work and thank you very much
Best wishes from Inger Kisby"

Featured Activity

Triangle Solver

Triangle Solver

This simple calculator will work out the lengths of the sides and the size of the angles of any triangle given thee particular pieces of information.


There are answers to this exercise but they are only available to teachers who have subscribed to Transum and are currently signed in on this computer.

A Transum subscription unlocks the answers to most of the student online exercises, quizzes and puzzles. It also provides the teacher with access to quality external links on each of the Transum topic pages so that teachers can easily find the excellent resources we have found and add to the collection themselves.

Class lists, lesson plans and assessment data can also be stored in the Class Admin application and the teacher also has access to the Transum Trophies earned by class members.

Go Maths

Learning and understanding Mathematics, at every level, requires learner engagement. Mathematics is not a spectator sport. Sometimes traditional teaching fails to actively involve students. One way to address the problem is through the use of interactive activities and this web site provides many of those. Click here for more activities designed for students in upper Secondary/High school.

Do you have any comments? It is always useful to receive feedback and helps make this free resource even more useful for those learning Mathematics anywhere in the world. Click here to enter your comments.

Description of Levels



Level 1 - Determining whether two triangles are congruent and finding the reason

Level 2 - Further questions ordered randomly


Don't wait until you have finished the exercise before you click on the 'Check' button. Click it often as you work through the questions to see if you are answering them correctly.