Triangles in IB MYP Grade 3 Mathematics
In IB MYP Grade 3 Mathematics, Triangles, within Geometry gives intermediate learners (ages 13–14) the chance to practise naming types of triangles, calculating the area of a triangle and applying triangle angle properties.
MYP Mathematics is assessed against four criteria (A: knowing and understanding, B: investigating patterns, C: communicating and D: applying mathematics in real-world contexts). Regular practice with triangles builds the knowledge and skills those criteria reward.
What learners practise
- Naming types of triangles
- Calculating the area of a triangle
- Applying triangle angle properties
For students
Work through the worksheets, practice questions and revision resources at your own pace. Check your answers, then redo anything that felt tricky and explain each answer in your own words.
For revision
Use these resources for homework, end-of-unit revision and catching up on anything missed in class.
For teachers
Use triangles activities as a starter, homework or retrieval practice, and mix free and premium resources to differentiate.
Show every step of your working, then check each answer by estimating first. Examiners reward clear reasoning as much as correct answers.
Quick answers
Who is the Triangles page for?
It is for IB MYP Grade 3 Mathematics learners, typically aged 13–14, and for the parents and teachers who support them.
Are triangles resources free?
Many are. Each resource shows a clear Free or price label, so you can start with the free ones and add premium resources when you need more practice.
How should I use these resources?
Pick one resource, complete it without help first, then check and correct. Repeating this little and often is more effective than one long session.
Keep exploring
Geometry 
Triangles 
Triangles 
Triangles 
Triangles