A Tale of Three Intersecting Lines
Class 7 · Mathematics
3 ideas in Class 7 Mathematics, explained in plain words, with games and quizzes to practise.
Side Lengths and Triangle Construction
Part of: Triangle Types
This concept develops ways to classify triangles, test possible side lengths, and reason about angle measures.
Why it matters. Triangle properties help you decide what shapes can exist and find missing measurements.
Try it in two minutes
- Identify the side or angle information.
- Choose the relevant triangle rule.
- Check each condition before deciding.
Try at home. With an adult, draw triangles using different measured side lengths and compare their angles.
When Three Lengths Can Form a Triangle
Part of: Triangle Inequality
This concept develops ways to classify triangles, test possible side lengths, and reason about angle measures.
Why it matters. Triangle properties help you decide what shapes can exist and find missing measurements.
Try it in two minutes
- Identify the side or angle information.
- Choose the relevant triangle rule.
- Check each condition before deciding.
Try at home. With an adult, draw triangles using different measured side lengths and compare their angles.
Angle Sum and Angle Types
Part of: Triangle Angles
This concept develops ways to classify triangles, test possible side lengths, and reason about angle measures.
Why it matters. Triangle properties help you decide what shapes can exist and find missing measurements.
Try it in two minutes
- Identify the side or angle information.
- Choose the relevant triangle rule.
- Check each condition before deciding.
Try at home. With an adult, draw triangles using different measured side lengths and compare their angles.
What your child will practise
- Angle Sum and Angle Types: Jungle Quick Fire (Quick Fire)
- Angle Sum and Angle Types: Mission Control Quest (Collect the Answer)
- Angle Sum and Angle Types: Space Puzzle (Clue Puzzle)
- Side Lengths and Triangle Construction: Number Sort (Sort It Out)
- When Three Lengths Can Form a Triangle: Desert Quick Fire (Quick Fire)
- Quiz: Angle Sum and Angle Types (8 questions)
- Quiz: Side Lengths and Triangle Construction (8 questions)
- Quiz: When Three Lengths Can Form a Triangle (8 questions)