Angles in a Triangle Mastery
An interactive lesson on screen. Your child works through worked examples, practises on their own, then tests themselves with questions that get harder as they go.
About this lesson
By the end of this lesson your child can find any missing angle in a triangle, whether it is a straight calculation, an isosceles triangle, an exterior angle, or a full algebraic equation, and know exactly which rule to reach for.
Topics covered:
- Angle sum in a triangle, explored hands-on before any rule is given
- Missing angles in scalene and right-angled triangles
- Isosceles triangles, finding the top angle or both base angles
- Angles on a line and around a point
- Exterior angles, including straight-line and reflex-angle problems
- A multi-step challenge mixing several angle facts in one question
- Algebraic angles, forming and solving an equation from a triangle
- Reasoning and problem solving, spotting errors and working from ratios
Your child works through this lesson on any screen. They try each Explore tool for themselves, work through the practice questions on paper, then click to check their own answer.
How it's structured:
- Two draggable Explore tools let your child test the angle rules on a live shape, then every unit's worked example is clicked through line by line
- 52 practice questions in total, colour-coded easy, medium and hard, each with a click-to-reveal answer and a reveal-all option
- A dedicated multi-step challenge slide plus a final 12-question mixed challenge pulling from every unit
Most angle worksheets show a diagram and a blank answer box. Every answer here reveals its working line by line, colour-coded, with each angle it finds drawn straight onto the diagram, so your child can see exactly where each number came from, not just what the final answer is.
Use this if:
- Your child is in Year 4 to Year 11 and needs to build confidence with angle facts
- You're preparing for the 11+, where angle reasoning questions come up regularly
- Your child is doing GCSE Foundation and loses marks on multi-step angle problems
- You want a resource your child can check their own work with, not one more thing on your to-do list
Built by an experienced maths teacher with over 3,000 hours of one-to-one tutoring experience and a Master's in Education.
Format: Interactive digital lesson, link sent by email straight after purchase.
Suitable for: Year 4 to Year 11, 11+, KS2, KS3, KS4, GCSE Foundation.
Who this is for
Built for students who want to practise independently, at their own pace, with clear examples and instant feedback rather than a static worksheet.
What's included
Worked examples
See the method explained step by step before trying it yourself.
Guided practice
Work through questions with answers hidden until you're ready to check.
Exam-style questions
Split easy to hard, so your child is always working at the right level.
How it works
Buy the lesson
Complete checkout securely through Shopify.
Get your link by email
Your lesson link lands in your inbox straight after payment.
Work through it on screen
Open the link on any device and start straight away.
FAQs
How do I access the lesson?
You'll get an email with your lesson link as soon as payment goes through. Click it to open the lesson in any browser, no login and no app to install.
How does the marking work?
There's no typing answers into a box. Your child works it out on paper, then clicks to reveal the correct answer and checks their own work. Full working is shown too, not just the final answer, so mistakes are easy to spot.
Does it work on a phone or tablet?
It works best on a tablet or laptop, where there's more room to read the examples and questions. It'll open on a phone too, but the text and diagrams can feel quite small on a smaller screen.
Can I use the lesson more than once?
Yes. There's no limit on how many times you open the link, so it's there for revision right up to the exam.
What if I lose the link or don't get the email?
Email info@shlc-tutor.co.uk and we'll resend it straight away.
Ready to start?
Link sent to your email, ready in seconds
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