📐 Geometry & Measures

Congruence

Learn congruence with a GCSE-style explanation, help guide, worked example, practice question and flashcards.

GeometryGCSE25 XP completion3 flashcards

Global XP

Level 1

0 / 100 XP

1. Explanation

Key idea

Congruence is part of geometry and appears often in KS3–GCSE maths.
Conguent shapes are identical in shape and size.
Use the worked model, help guide, interactive question and flashcards to practise congruence until the steps feel automatic.

Shopping, sport, travel, science, design and everyday decisions all use this skill.

2. Visual

Understand the key idea → follow the help guide → practise a question → check your method → build speed with flashcards.

3. Help guide

Learn the rule: Conguent shapes are identical in shape and size.
Worked model: Match corresponding sides or angles. Use equal lengths and angles. Check size and shape are identical.
Try the interactive question without looking at the answer first.
Use the flashcards to test the rule, the method and a common check.

4. Worked examples

Answer: A 40° angle matches a 40° angle

5. Interactive questions

6. Flashcards

Flip each card, then choose whether you know it or need more practice.

0 mastered

FrontRule for Congruence

BackConguent shapes are identical in shape and size.

FrontExample answer: Two congruent triangles have matching side 7 cm. What is the matching side on the other triangle?

BackMatching sides in congruent shapes are equal, so the side is 7 cm.

FrontCommon check for Congruence

BackCheck units/notation, compare with an estimate, and make sure the answer matches the question.

7. Finish

When you have read the examples, tried the question and reviewed flashcards, claim your topic completion XP.