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Area of any triangle
Use A = ½bh for acute, right and obtuse triangles in any orientation, and work backwards to find a missing base or height.
⏱ 18 min❓ 10 questions
What you'll be able to do
- ✔I can use A = ½bh for any triangle, including obtuse triangles
- ✔I can pick out a base and its matching perpendicular height in any orientation
- ✔I can find a missing base or height when I know the area
How this works
- 1Read the short explanations first — they teach you what you need before each question.
- 2Answer each question, then tap Check. A right answer moves you on automatically; if it's wrong, you'll see a friendly explanation of why.
- 3Finish all 3 steps to see your score — sign in and subscribe to unlock the full lesson and save it.
What's inside
10 questions and 1 quick teaching card, including:
- 🔢Number answer — Work out the answer and type the number.
👪Grown-up tip: sit alongside younger learners for the first few lessons. Read the questions together and chat about the explanations — that's where the real learning sticks.
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Curriculum: AC9M7M01