Find area
- Choose the correct formula.
- Substitute lengths.
- Use squared units.
Answer: Rectangle 6 cm by 4 cm has area 24 cm²
📐 Geometry & Measures
Surface area
Learn surface area with a GCSE-style explanation, help guide, worked example, practice question and flashcards.
Global XP
Level 10 / 100 XP
1. Explanation
Key idea
- Surface area is part of geometry and appears often in KS3–GCSE maths.
- Area measures the space inside a 2D shape.
- Use the worked model, help guide, interactive question and flashcards to practise surface area until the steps feel automatic.
Real-life examples
- Shopping, sport, travel, science, design and everyday decisions all use this skill.
2. Visual
Surface area learning map
Understand the key idea → follow the help guide → practise a question → check your method → build speed with flashcards.
3. Help guide
How to tackle Surface area
- Learn the rule: Area measures the space inside a 2D shape.
- Worked model: Choose the correct formula. Substitute lengths. Use squared units.
- 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
Step-by-step working
5. Interactive questions
Try it yourself
Find the area of a triangle with base 8 cm and height 5 cm.
6. Flashcards
Master quick recall
Flip each card, then choose whether you know it or need more practice.
0 mastered
FrontRule for Surface area
BackArea measures the space inside a 2D shape.
FrontExample answer: Find the area of a triangle with base 8 cm and height 5 cm.
Back1/2 × 8 × 5 = 20 cm².
FrontCommon check for Surface area
BackCheck units/notation, compare with an estimate, and make sure the answer matches the question.
7. Finish
Complete this topic
When you have read the examples, tried the question and reviewed flashcards, claim your topic completion XP.